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

Bumps [@commitlint/config-conventional](https://github.com/conventional-changelog/commitlint/tree/HEAD/@commitlint/config-conventional) from 20.4.0 to 20.4.2.
- [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/v20.4.2/@commitlint/config-conventional)

---
updated-dependencies:
- dependency-name: "@commitlint/config-conventional"
  dependency-version: 20.4.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -40,7 +40,7 @@
   "devDependencies": {
     "@antfu/eslint-config": "~4.10.1",
     "@commitlint/cli": "^19.8.0",
-    "@commitlint/config-conventional": "^20.4.0",
+    "@commitlint/config-conventional": "^20.4.2",
     "@types/echarts": "^4.9.21",
     "@types/lodash": "^4.17.6",
     "@types/mockjs": "^1.0.10",