chore(package): update cz-conventional-changelog to version 3.1.1

Closes #197

Author: greenkeeper[bot]

package.json

@@ -91,7 +91,7 @@
     "brotli-size": "0.0.3",
     "commitizen": "3.0.5",
     "cross-var": "1.1.0",
-    "cz-conventional-changelog": "2.1.0",
+    "cz-conventional-changelog": "3.1.1",
     "gzip-size": "5.0.0",
     "husky": "1.3.0",
     "jest": "23.6.0",