Fixed travis lint warnings

.travis.yml

@@ -1,11 +1,11 @@
 language: php
 php:
-    - 7.1
-    - 7.2
-    - 7.3
-    - 7.4
+  - 7.1
+  - 7.2
+  - 7.3
+  - 7.4
 before_install:
-    - phpenv config-rm xdebug.ini || true
+  - phpenv config-rm xdebug.ini || true
 
 install:
   - composer config --global discard-changes true
@@ -19,20 +19,21 @@ install:
 script: composer check
 
 env:
-    matrix:
-        - DEPS="low"
-        - DEPS="high"
-        - DEPS="stable"
-        - DEPS="dev"
     global:
-        - DEFAULT_COMPOSER_FLAGS="--no-interaction --no-suggest"
+      - DEFAULT_COMPOSER_FLAGS="--no-interaction --no-suggest"
+    jobs:
+      - DEPS="low"
+      - DEPS="high"
+      - DEPS="stable"
+      - DEPS="dev"
 
 cache:
   directories:
     - $HOME/.composer/cache/files
     - $HOME/.composer/cache/vcs
 
-allow_failures:
+jobs:
+  allow_failures:
     - php: 7.1
       env: DEPS="dev"
     - php: 7.2