Update Libero coding standard and PHPStan (#59)

* Update Libero coding standard and PHPStan

* Fix lock

Author: thewilkybarkid

composer.json

@@ -45,7 +45,7 @@
     },
     "require-dev": {
         "csa/guzzle-cache-middleware": "^1.0",
-        "libero/coding-standard": "^0.3",
+        "libero/coding-standard": "^0.4",
         "php-vfs/php-vfs": "^1.4",
         "phpstan/phpstan": "^0.11",
         "phpstan/phpstan-phpunit": "^0.11",