chore(deps): Bump @tiptap/starter-kit from 2.0.4 to 2.1.6

Bumps [@tiptap/starter-kit](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/starter-kit) from 2.0.4 to 2.1.6.
- [Release notes](https://github.com/ueberdosis/tiptap/releases)
- [Changelog](https://github.com/ueberdosis/tiptap/blob/develop/packages/starter-kit/CHANGELOG.md)
- [Commits](https://github.com/ueberdosis/tiptap/commits/v2.1.6/packages/starter-kit)

---
updated-dependencies:
- dependency-name: "@tiptap/starter-kit"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -35,7 +35,7 @@
     "@tiptap/extension-character-count": "^2.0.4",
     "@tiptap/extension-task-item": "^2.0.4",
     "@tiptap/extension-task-list": "^2.0.4",
-    "@tiptap/starter-kit": "^2.0.4",
+    "@tiptap/starter-kit": "^2.1.6",
     "@tiptap/vue-2": "^2.0.4",
     "debounce": "^1.2.1",
     "vue": "^2.7.14",