build(deps-dev): bump @commitlint/config-conventional

Bumps [@commitlint/config-conventional](https://github.com/conventional-changelog/commitlint/tree/HEAD/@commitlint/config-conventional) from 12.1.4 to 17.6.6.
- [Release notes](https://github.com/conventional-changelog/commitlint/releases)
- [Changelog](https://github.com/conventional-changelog/commitlint/blob/master/@commitlint/config-conventional/CHANGELOG.md)
- [Commits](https://github.com/conventional-changelog/commitlint/commits/v17.6.6/@commitlint/config-conventional)

---
updated-dependencies:
- dependency-name: "@commitlint/config-conventional"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -46,7 +46,7 @@
   },
   "devDependencies": {
     "@commitlint/cli": "^12.0.1",
-    "@commitlint/config-conventional": "^12.1.4",
+    "@commitlint/config-conventional": "^17.6.6",
     "ava": "^3.15.0",
     "husky": "^5.1.3",
     "lint-staged": "^10.5.4",