chore(deps): update commitlint monorepo to v12 (#161)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package.json

@@ -40,8 +40,8 @@
     "url": "https://github.com/netlify-labs/netlify-plugin-lighthouse/issues"
   },
   "devDependencies": {
-    "@commitlint/cli": "^11.0.0",
-    "@commitlint/config-conventional": "^11.0.0",
+    "@commitlint/cli": "^12.0.0",
+    "@commitlint/config-conventional": "^12.0.0",
     "eslint": "^7.0.0",
     "husky": "^4.0.7",
     "jest": "^26.1.0",