chore(deps): update commitlint monorepo to v12

Author: renovate-bot

package.json

@@ -24,8 +24,8 @@
     "release": "npm run test && npm run build && npm run publish"
   },
   "devDependencies": {
-    "@commitlint/cli": "^8.1.0",
-    "@commitlint/config-conventional": "^8.1.0",
+    "@commitlint/cli": "^12.0.0",
+    "@commitlint/config-conventional": "^12.0.0",
     "@types/jest": "^25.0.0",
     "@types/node": "^10.14.7",
     "@typescript-eslint/eslint-plugin": "^2.0.0",