FEATURE: move the file CustomPhpStanFunctionMap to the config directory

Author: arp

generator/src/PhpStanFunctions/CustomPhpStanFunctionMap.php renamed to generator/config/CustomPhpStanFunctionMap.php

@@ -17,7 +17,7 @@ class PhpStanFunctionMapReader
     public function __construct()
     {
         $this->functionMap = require 'phar://'.__DIR__.'/../../vendor/phpstan/phpstan/phpstan.phar/resources/functionMap.php';
-        $this->customFunctionMap = require __DIR__.'/CustomPhpStanFunctionMap.php';
+        $this->customFunctionMap = require __DIR__ . '/../../config/CustomPhpStanFunctionMap.php';
     }
 
     public function hasFunction(string $functionName): bool