chore(deps): update commitlint monorepo to v8 (#1594)

Author: renovate[bot]

package.json

@@ -64,8 +64,8 @@
         "vue-template-compiler": ">=2.6.0"
     },
     "devDependencies": {
-        "@commitlint/cli": "^6.2.0",
-        "@commitlint/config-conventional": "^6.1.3",
+        "@commitlint/cli": "^8.0.0",
+        "@commitlint/config-conventional": "^8.0.0",
         "@octokit/rest": "^15.4.1",
         "@vue/cli-plugin-eslint": "^4.0.0",
         "@vue/server-test-utils": "1.0.0-beta.16",