chore(deps): update commitlint monorepo to v19

Author: renovate[bot]

package.json

@@ -36,8 +36,8 @@
     }
   },
   "devDependencies": {
-    "@commitlint/cli": "^18.6.1",
-    "@commitlint/config-conventional": "^18.6.2",
+    "@commitlint/cli": "^19.0.3",
+    "@commitlint/config-conventional": "^19.0.3",
     "@sourcegraph/eslint-config": "^0.37.1",
     "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/tsconfig": "^4.0.1",