feat: add new customer creation script with metadata handling

Author: wozozo

composer.json

@@ -22,8 +22,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "~5.7 || ~9.5",
-    "squizlabs/php_codesniffer": "~3.6",
-    "friendsofphp/php-cs-fixer": "^3.75"
+    "squizlabs/php_codesniffer": "~3.6"
   },
   "autoload": {
     "psr-4": { "Payjp\\" : "lib/" }
@@ -39,7 +38,14 @@
        "phpunit"
      ],
      "fix": [
+       "@php -r \"if (PHP_VERSION_ID < 70400) { echo 'PHP 7.4 or higher is required. Current version: ' . PHP_VERSION . PHP_EOL; exit(1); }\"",
        "PHP_CS_FIXER_IGNORE_ENV=1 ./vendor/bin/php-cs-fixer fix --allow-risky=yes"
      ]
+  },
+  "config": {
+    "platform-check": false
+  },
+  "suggest": {
+    "friendsofphp/php-cs-fixer": "Required for the fix command (requires PHP >= 7.4)"
   }
 }