Use shared style repo

.php_cs.dist

@@ -1,40 +1,13 @@
 <?php
 
-return PhpCsFixer\Config::create()
-    ->setRiskyAllowed(true)
-    ->setRules([
-        "@PSR1" => true,
-        "@PSR2" => true,
-        "braces" => [
-            "allow_single_line_closure" => true,
-        ],
-        "array_syntax" => ["syntax" => "short"],
-        "cast_spaces" => true,
-        "combine_consecutive_unsets" => true,
-        "function_to_constant" => true,
-        "native_function_invocation" => true,
-        "no_multiline_whitespace_before_semicolons" => true,
-        "no_unused_imports" => true,
-        "no_useless_else" => true,
-        "no_useless_return" => true,
-        "no_whitespace_before_comma_in_array" => true,
-        "no_whitespace_in_blank_line" => true,
-        "non_printable_character" => true,
-        "normalize_index_brace" => true,
-        "ordered_imports" => true,
-        "php_unit_construct" => true,
-        "php_unit_dedicate_assert" => true,
-        "php_unit_fqcn_annotation" => true,
-        "phpdoc_summary" => true,
-        "phpdoc_types" => true,
-        "psr4" => true,
-        "return_type_declaration" => ["space_before" => "none"],
-        "short_scalar_cast" => true,
-        "single_blank_line_before_namespace" => true,
-    ])
-    ->setFinder(
-        PhpCsFixer\Finder::create()
-            ->in(__DIR__ . "/examples")
-            ->in(__DIR__ . "/lib")
-            ->in(__DIR__ . "/test")
-    );
+$config = new Amp\CodeStyle\Config();
+$config->getFinder()
+    ->in(__DIR__ . '/examples')
+    ->in(__DIR__ . '/lib')
+    ->in(__DIR__ . '/test');
+
+$cacheDir = getenv('TRAVIS') ? getenv('HOME') . '/.php-cs-fixer' : __DIR__;
+
+$config->setCacheFile($cacheDir . '/.php_cs.cache');
+
+return $config;

.travis.yml

@@ -54,4 +54,6 @@ after_script:
 
 cache:
   directories:
-    - $HOME/.composer/cache/files
+    - $HOME/.composer/cache
+    - $HOME/.php-cs-fixer
+    - $HOME/.local

composer.json

@@ -37,8 +37,8 @@
     },
     "require-dev": {
         "amphp/phpunit-util": "^1",
+        "amphp/php-cs-fixer-config": "dev-master",
         "react/promise": "^2",
-        "friendsofphp/php-cs-fixer": "^2.3",
         "phpunit/phpunit": "^6.0.9",
         "phpstan/phpstan": "^0.8.5"
     },