chore: migrate to PHP-CS-Fixer 3.x

.gitattributes

@@ -1,16 +1,14 @@
-/art               export-ignore
-/docs              export-ignore
-/tests             export-ignore
-/scripts           export-ignore
-/.github           export-ignore
-/.php_cs           export-ignore
-.editorconfig      export-ignore
-.gitattributes     export-ignore
-.gitignore         export-ignore
-.travis.yml        export-ignore
-phpstan.neon       export-ignore
-rector.yaml        export-ignore
-phpunit.xml        export-ignore
-CHANGELOG.md       export-ignore
-CONTRIBUTING.md    export-ignore
-README.md          export-ignore
+/art                     export-ignore
+/docs                    export-ignore
+/tests                   export-ignore
+/scripts                 export-ignore
+/.github                 export-ignore
+/.php-cs-fixer.dist.php  export-ignore
+.editorconfig            export-ignore
+.gitattributes           export-ignore
+.gitignore               export-ignore
+phpstan.neon             export-ignore
+phpunit.xml              export-ignore
+CHANGELOG.md             export-ignore
+CONTRIBUTING.md          export-ignore
+README.md                export-ignore

.gitignore

@@ -4,7 +4,8 @@ composer.lock
 /vendor/
 coverage.xml
 .phpunit.result.cache
-.php_cs.cache
+/.php-cs-fixer.php
+.php-cs-fixer.cache
 .temp/coverage.php
 *.swp
 *.swo

.php_cs → .php-cs-fixer.dist.php

@@ -1,9 +1,9 @@
 <?php
 
 $finder = PhpCsFixer\Finder::create()
-    ->in(__DIR__ . DIRECTORY_SEPARATOR . 'tests')
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'src')
-    ->append(['.php_cs']);
+    ->in(__DIR__ . DIRECTORY_SEPARATOR . 'tests')
+    ->append(['.php-cs-fixer.dist.php']);
 
 $rules = [
     '@Symfony'               => true,
@@ -22,7 +22,7 @@
 
 $rules['increment_style'] = ['style' => 'post'];
 
-return PhpCsFixer\Config::create()
+return (new PhpCsFixer\Config())
     ->setUsingCache(true)
     ->setRules($rules)
     ->setFinder($finder);