Install required stubs mandatory by default

Author: pinepain

composer.json

@@ -15,14 +15,14 @@
     "require": {
         "php": "~7.1",
         "league/flysystem": "^1.0",
+        "pinepain/php-v8-stubs": "^0.2.0",
+        "pinepain/php-ref-stubs": "^0.5.0",
         "pinepain/php-object-maps": "^0.3.0"
     },
     "require-dev": {
         "illuminate/support": "5.5.*",
         "illuminate/contracts": "5.5.*",
         "phpunit/phpunit": "~6.3",
-        "pinepain/php-v8-stubs": "^0.2.0",
-        "pinepain/php-ref-stubs": "^0.5.0",
         "phpstan/phpstan": "^0.8.5"
     },
     "autoload": {