Bump christophwurst/nextcloud from 18.0.4 to 19.0.0

Bumps [christophwurst/nextcloud](https://github.com/ChristophWurst/nextcloud_composer) from 18.0.4 to 19.0.0.
- [Release notes](https://github.com/ChristophWurst/nextcloud_composer/releases)
- [Commits](ChristophWurst/nextcloud_composer@v18.0.4...v19.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

composer.json

@@ -9,7 +9,7 @@
         "nextcloud/coding-standard": "^0.3.0"
     },
     "require-dev": {
-        "christophwurst/nextcloud": "v18.0.4",
+        "christophwurst/nextcloud": "v19.0.0",
         "christophwurst/nextcloud_testing": "0.10.0",
         "phan/phan": "^3.0"
     },