diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index ad2dc65..938a02c 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -23,22 +23,32 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - name: Run npm install
-        run: npm ci
-        env:
-          CI: true
-      - name: Run build
-        run: npm run build
-        env:
-          CI: true
-      - name: Run lint
-        run: npm run lint
-        env:
-          CI: true
-      - name: Run test
-        run: npm test
+      - name: npm install, build and test
+        run: |
+          npm ci
+          npm run build
+          npm run lint
+          npm run test-coverage
         env:
           CI: true
+      - name: Coveralls Parallel
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}
+          flag-name: run-${{ matrix.node-version }}
+          parallel: true
+
+  finish:
+    needs: build
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}
+          parallel-finished: true
 
   publish-npm:
     # publish only if we are on our own repo, event was 'create' (a tag was created) and the tag starts with "v" (aka version tag)
diff --git a/.gitignore b/.gitignore
index 491fc35..0e20dd0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,203 @@
-node_modules
+# Created by .ignore support plugin (hsz.mobi)
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### VisualStudioCode template
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+### Node template
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
 lib
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.pnp.*
+
diff --git a/package-lock.json b/package-lock.json
index 9a0d4cf..c3baeb8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,12 +13,174 @@
         "@babel/highlight": "^7.8.3"
       }
     },
+    "@babel/core": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.9.0.tgz",
+      "integrity": "sha512-kWc7L0fw1xwvI0zi8OKVBuxRVefwGOrKSQMvrQ3dW+bIIavBY3/NpXmpjMy7bQnLgwgzWQZ8TlM57YHpHNHz4w==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.9.0",
+        "@babel/helper-module-transforms": "^7.9.0",
+        "@babel/helpers": "^7.9.0",
+        "@babel/parser": "^7.9.0",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.9.0",
+        "@babel/types": "^7.9.0",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.2",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/generator": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.9.5.tgz",
+      "integrity": "sha512-GbNIxVB3ZJe3tLeDm1HSn2AhuD/mVcyLDpgtLXa5tplmWrJdF/elxB56XNqCuD6szyNkDi6wuoKXln3QeBmCHQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.9.5",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.13",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.9.5.tgz",
+      "integrity": "sha512-JVcQZeXM59Cd1qanDUxv9fgJpt3NeKUaqBqUEvfmQ+BCOKq2xUgaWZW2hr0dkbyJgezYuplEoh5knmrnS68efw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-get-function-arity": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.9.5"
+      }
+    },
+    "@babel/helper-get-function-arity": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz",
+      "integrity": "sha512-FVDR+Gd9iLjUMY1fzE2SR0IuaJToR4RkCDARVfsBBPSP53GEqSFjD8gNyxg246VUyc/ALRxFaAK8rVG7UT7xRA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-member-expression-to-functions": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.8.3.tgz",
+      "integrity": "sha512-fO4Egq88utkQFjbPrSHGmGLFqmrshs11d46WI+WZDESt7Wu7wN2G2Iu+NMMZJFDOVRHAMIkB5SNh30NtwCA7RA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-imports": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.8.3.tgz",
+      "integrity": "sha512-R0Bx3jippsbAEtzkpZ/6FIiuzOURPcMjHp+Z6xPe6DtApDJx+w7UYyOLanZqO8+wKR9G10s/FmHXvxaMd9s6Kg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-transforms": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.9.0.tgz",
+      "integrity": "sha512-0FvKyu0gpPfIQ8EkxlrAydOWROdHpBmiCiRwLkUiBGhCUPRRbVD2/tm3sFr/c/GWFrQ/ffutGUAnx7V0FzT2wA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.8.3",
+        "@babel/helper-replace-supers": "^7.8.6",
+        "@babel/helper-simple-access": "^7.8.3",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/template": "^7.8.6",
+        "@babel/types": "^7.9.0",
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-optimise-call-expression": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.8.3.tgz",
+      "integrity": "sha512-Kag20n86cbO2AvHca6EJsvqAd82gc6VMGule4HwebwMlwkpXuVqrNRj6CkCV2sKxgi9MyAUnZVnZ6lJ1/vKhHQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-replace-supers": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.8.6.tgz",
+      "integrity": "sha512-PeMArdA4Sv/Wf4zXwBKPqVj7n9UF/xg6slNRtZW84FM7JpE1CbG8B612FyM4cxrf4fMAMGO0kR7voy1ForHHFA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-member-expression-to-functions": "^7.8.3",
+        "@babel/helper-optimise-call-expression": "^7.8.3",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.6"
+      }
+    },
+    "@babel/helper-simple-access": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.8.3.tgz",
+      "integrity": "sha512-VNGUDjx5cCWg4vvCTR8qQ7YJYZ+HBjxOgXEl7ounz+4Sn7+LMD3CFrCTEU6/qXKbA2nKg21CwhhBzO0RpRbdCw==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz",
+      "integrity": "sha512-3x3yOeyBhW851hroze7ElzdkeRXQYQbFIb7gLK1WQYsw2GWDay5gAJNw1sWJ0VFP6z5J1whqeXH/WCdCjZv6dA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
     "@babel/helper-validator-identifier": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.9.5.tgz",
       "integrity": "sha512-/8arLKUFq882w4tWGj9JYzRpAlZgiWUJ+dtteNTDqrRBz9Iguck9Rn3ykuBDoUwh2TO4tSAJlrxDUOXWklJe4g==",
       "dev": true
     },
+    "@babel/helpers": {
+      "version": "7.9.2",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.9.2.tgz",
+      "integrity": "sha512-JwLvzlXVPjO8eU9c/wF9/zOIN7X6h8DYf7mG4CiFRZRvZNKEF5dQ3H3V+ASkHoIB3mWhatgl5ONhyqHRI6MppA==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.9.0",
+        "@babel/types": "^7.9.0"
+      }
+    },
     "@babel/highlight": {
       "version": "7.9.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
@@ -30,6 +192,85 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@babel/parser": {
+      "version": "7.9.4",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.9.4.tgz",
+      "integrity": "sha512-bC49otXX6N0/VYhgOMh4gnP26E9xnDZK3TmbNpxYzzz9BQLBosQwfyOe9/cXUU3txYhTzLCbcqd5c8y/OmCjHA==",
+      "dev": true
+    },
+    "@babel/template": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.8.6.tgz",
+      "integrity": "sha512-zbMsPMy/v0PWFZEhQJ66bqjhH+z0JgMoBWuikXybgG3Gkd/3t5oQ1Rw2WQhnSrsOmsKXnZOx15tkC4qON/+JPg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/parser": "^7.8.6",
+        "@babel/types": "^7.8.6"
+      }
+    },
+    "@babel/traverse": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.9.5.tgz",
+      "integrity": "sha512-c4gH3jsvSuGUezlP6rzSJ6jf8fYjLj3hsMZRx/nX0h+fmHN0w+ekubRrHPqnMec0meycA2nwCsJ7dC8IPem2FQ==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.9.5",
+        "@babel/helper-function-name": "^7.9.5",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/parser": "^7.9.0",
+        "@babel/types": "^7.9.5",
+        "debug": "^4.1.0",
+        "globals": "^11.1.0",
+        "lodash": "^4.17.13"
+      },
+      "dependencies": {
+        "globals": {
+          "version": "11.12.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz",
+          "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==",
+          "dev": true
+        }
+      }
+    },
+    "@babel/types": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.9.5.tgz",
+      "integrity": "sha512-XjnvNqenk818r5zMaba+sLQjnbda31UfUURv3ei0qPQw4u+j2jMyJ5b11y8ZHYTRSI3NnInQkkkRT4fLqqPdHg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.9.5",
+        "lodash": "^4.17.13",
+        "to-fast-properties": "^2.0.0"
+      }
+    },
+    "@istanbuljs/load-nyc-config": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0.tgz",
+      "integrity": "sha512-ZR0rq/f/E4f4XcgnDvtMWXCUJpi8eO0rssVhmztsZqLIEFA9UUP9zmpE0VxlM+kv/E1ul2I876Fwil2ayptDVg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.3.1",
+        "find-up": "^4.1.0",
+        "js-yaml": "^3.13.1",
+        "resolve-from": "^5.0.0"
+      },
+      "dependencies": {
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@istanbuljs/schema": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.2.tgz",
+      "integrity": "sha512-tsAQNx32a8CoFhjhijUIhI4kccIAgmGhy8LZMZgGfmXcpMbPRUqn5LWmgRttILi6yeGmBJd2xsPkFMs0PzgPCw==",
+      "dev": true
+    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -139,6 +380,16 @@
       "integrity": "sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==",
       "dev": true
     },
+    "aggregate-error": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.0.1.tgz",
+      "integrity": "sha512-quoaXsZ9/BLNae5yiNoUz+Nhkwz83GhWwtYFglcjEQB2NDHCIpApbqXxIFnm4Pq/Nvhrsq5sYJFyohrrxnTGAA==",
+      "dev": true,
+      "requires": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      }
+    },
     "ajv": {
       "version": "6.12.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.0.tgz",
@@ -183,6 +434,21 @@
         "color-convert": "^1.9.0"
       }
     },
+    "append-transform": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-2.0.0.tgz",
+      "integrity": "sha512-7yeyCEurROLQJFv5Xj4lEGTy0borxepjFv1g22oAdqFu//SrAlDl1O1Nxx15SH1RoliUml6p8dwJW9jvZughhg==",
+      "dev": true,
+      "requires": {
+        "default-require-extensions": "^3.0.0"
+      }
+    },
+    "archy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/archy/-/archy-1.0.0.tgz",
+      "integrity": "sha1-+cjBN1fMHde8N5rHeyxipcKGjEA=",
+      "dev": true
+    },
     "argparse": {
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       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
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+            "glob": "^7.1.3"
+          }
+        },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -1213,6 +2099,12 @@
         }
       }
     },
+    "strip-bom": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-4.0.0.tgz",
+      "integrity": "sha512-3xurFv5tEgii33Zi8Jtp55wEIILR9eh34FAW00PZf+JnSsTmV/ioewSgQl97JHvgjoRGwPShsWm+IdrxB35d0w==",
+      "dev": true
+    },
     "strip-json-comments": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.0.tgz",
@@ -1265,6 +2157,17 @@
         }
       }
     },
+    "test-exclude": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+      "integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+      "dev": true,
+      "requires": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
+      }
+    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -1286,6 +2189,12 @@
         "os-tmpdir": "~1.0.2"
       }
     },
+    "to-fast-properties": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
+      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
+      "dev": true
+    },
     "tslib": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.11.1.tgz",
@@ -1316,6 +2225,15 @@
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       "dev": true
     },
+    "typedarray-to-buffer": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+      "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+      "dev": true,
+      "requires": {
+        "is-typedarray": "^1.0.0"
+      }
+    },
     "typedoc": {
       "version": "0.17.0-3",
       "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.17.0-3.tgz",
@@ -1384,6 +2302,12 @@
         "punycode": "^2.1.0"
       }
     },
+    "uuid": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+      "dev": true
+    },
     "v8-compile-cache": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
@@ -1410,6 +2334,12 @@
         "isexe": "^2.0.0"
       }
     },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
+    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
@@ -1422,6 +2352,53 @@
       "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
       "dev": true
     },
+    "wrap-ansi": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
+      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
+          "integrity": "sha512-9VGjrMsG1vePxcSweQsN20KY/c4zN0h9fLjqAbwbPfahM3t+NL+M9HC8xeXG2I8pX5NoamTGNuomEUFI7fcUjA==",
+          "dev": true,
+          "requires": {
+            "@types/color-name": "^1.1.1",
+            "color-convert": "^2.0.1"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+          "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+          "dev": true,
+          "requires": {
+            "color-name": "~1.1.4"
+          }
+        },
+        "color-name": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
+          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        }
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@@ -1436,6 +2413,53 @@
       "requires": {
         "mkdirp": "^0.5.1"
       }
+    },
+    "write-file-atomic": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "dev": true
+    },
+    "yargs": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.3.1.tgz",
+      "integrity": "sha512-92O1HWEjw27sBfgmXiixJWT5hRBp2eobqXicLtPBIDBhYB+1HpwZlXmbW2luivBJHBzki+7VyCLRtAkScbTBQA==",
+      "dev": true,
+      "requires": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.1"
+      }
+    },
+    "yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 59bbb52..c1f18cf 100644
--- a/package.json
+++ b/package.json
@@ -5,10 +5,11 @@
   "main": "lib/srp.js",
   "types": "lib/srp.d.ts",
   "scripts": {
-    "clean": "rm -rf lib",
+    "clean": "rimraf lib && rimraf coverage && rimraf .nyc_output",
     "lint": "eslint 'src/**/*.{js,ts,json}'",
     "build": "npm run clean && tsc",
     "test": "vows lib/test/test_*.js --spec",
+    "test-coverage": "nyc --reporter=lcovonly npm run test",
     "docs": "typedoc src/srp.ts",
     "prepublishOnly": "npm run build",
     "postpublish": "npm run clean"
@@ -34,9 +35,11 @@
     "@types/node": "^10.17.19",
     "typescript": "^3.8.3",
     "vows": "^0.8.3",
+    "nyc": "^15.0.1",
     "typedoc": "next",
     "eslint": "^6.8.0",
     "@typescript-eslint/parser": "^2.27.0",
-    "@typescript-eslint/eslint-plugin": "^2.27.0"
+    "@typescript-eslint/eslint-plugin": "^2.27.0",
+    "rimraf": "^3.0.2"
   }
 }