chore(package): update @commitlint/config-conventional to version 8.3.4

Closes #137

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
   },
   "devDependencies": {
     "@commitlint/cli": "8.3.5",
-    "@commitlint/config-conventional": "8.2.0",
+    "@commitlint/config-conventional": "8.3.4",
     "@types/jest": "24.0.18",
     "@types/node": "10.12.12",
     "concurrently": "4.1.2",