Update nextcloud-vue requirement from ^0.11.4 to ^0.12.1

Updates the requirements on [nextcloud-vue](https://github.com/nextcloud/nextcloud-vue) to permit the latest version.
- [Release notes](https://github.com/nextcloud/nextcloud-vue/releases)
- [Commits](https://github.com/nextcloud/nextcloud-vue/compare/v0.11.4...v0.12.1)

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

package.json

@@ -29,7 +29,7 @@
 		"@babel/polyfill": "^7.0.0",
 		"nextcloud-axios": "^0.2.0",
 		"nextcloud-server": "^0.15.9",
-		"nextcloud-vue": "^0.11.4",
+		"nextcloud-vue": "^0.12.1",
 		"nextcloud-vue-collections": "^0.5.2",
 		"vue": "^2.5.16",
 		"vue-click-outside": "^1.0.7",