chore(deps): update commitlint monorepo to v20

Author: renovate[bot]

package.json

@@ -9,8 +9,8 @@
   "devDependencies": {
     "@babel/cli": "^7.5.5",
     "@babel/core": "^7.5.5",
-    "@commitlint/cli": "^8.1.0",
-    "@commitlint/config-conventional": "^8.1.0",
+    "@commitlint/cli": "^20.0.0",
+    "@commitlint/config-conventional": "^20.0.0",
     "@mjolnir/babel-preset": "link:packages/babel-preset",
     "@mjolnir/eslint-config": "link:packages/eslint-config",
     "@mjolnir/prettier-config": "link:packages/prettier-config",