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

Closes #62

Author: greenkeeper[bot]

package.json

@@ -99,7 +99,7 @@
     "coveralls": "^3.0.1",
     "cross-env": "^5.1.5",
     "css-loader": "^0.28.11",
-    "cz-conventional-changelog": "^2.1.0",
+    "cz-conventional-changelog": "^3.1.1",
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-16": "^1.1.1",
     "enzyme-context-patch": "0.0.9",