Bump nextcloud/coding-standard from 0.3.0 to 0.4.0

Bumps [nextcloud/coding-standard](https://github.com/nextcloud/coding-standard) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/nextcloud/coding-standard/releases)
- [Changelog](https://github.com/nextcloud/coding-standard/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nextcloud/coding-standard/compare/v0.3.0...v0.4.0)

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

composer.json

@@ -13,7 +13,7 @@
 		"lint": "find . -name \\*.php -not -path './vendor/*' -print0 | xargs -0 -n1 php -l"
 	},
 	"require-dev": {
-		"nextcloud/coding-standard": "^0.3.0",
+		"nextcloud/coding-standard": "^0.4.0",
 		"phpunit/phpunit": "^7"
 	}
 }