Update nextcloud/coding-standard requirement from ^0.3.0 to ^0.5.0

Updates the requirements on nextcloud/coding-standard to permit the latest version.

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -28,7 +28,7 @@
 		"phpunit/phpunit": "^8.5",
 		"league/factory-muffin": "^3.0",
 		"league/factory-muffin-faker": "^2.0",
-		"nextcloud/coding-standard": "^0.3.0",
+		"nextcloud/coding-standard": "^0.5.0",
 		"doctrine/orm": "^2.7",
 		"vimeo/psalm": "^4.3"
 	},