chore(deps): update commitlint monorepo to v15

Author: renovate-bot

package.json

@@ -58,8 +58,8 @@
     "@babel/preset-typescript": "7.10.4",
     "@changesets/changelog-github": "^0.4.1",
     "@changesets/cli": "^2.17.0",
-    "@commitlint/cli": "9.1.2",
-    "@commitlint/config-conventional": "9.1.2",
+    "@commitlint/cli": "15.0.0",
+    "@commitlint/config-conventional": "15.0.0",
     "@rollup/plugin-alias": "3.1.1",
     "@types/jest": "26.0.10",
     "@types/node": "10.17.28",