fix: Addressing file_exists null arg deprecation. (#139)

Author: binaryk

.github/workflows/php-cs-fixer.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Run PHP CS Fixer
         uses: docker://oskarstark/php-cs-fixer-ga
         with:
-          args: --config=.php_cs.dist --allow-risky=yes
+          args: --config=.php_cs.dist.php --allow-risky=yes
 
       - name: Commit changes
         uses: stefanzweifel/git-auto-commit-action@v4

.php_cs.dist renamed to .php_cs.dist.php

@@ -51,6 +51,10 @@ protected function getOptionsFromConfigFile(): array
     {
         $configFilePath = $this->getConfigFileLocation();
 
+        if (! $configFilePath) {
+            return [];
+        }
+
         if (! file_exists($configFilePath)) {
             return [];
         }