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

Closes #20

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "babel-preset-es2015": "^6.22.0",
     "babel-preset-react": "^6.22.0",
     "babel-preset-react-hmre": "^1.1.1",
-    "cz-conventional-changelog": "^2.0.0",
+    "cz-conventional-changelog": "^3.1.1",
     "eslint": "^3.14.1",
     "eslint-config-ak-base": "^5.3.0",
     "mutationobserver-shim": "^0.3.2",