chore(package): update cz-conventional-changelog to version 3.0.2

Closes #40

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   "devDependencies": {
     "chai": "^4.1.2",
     "commitlint-config-traverson": "^1.0.1",
-    "cz-conventional-changelog": "^2.1.0",
+    "cz-conventional-changelog": "^3.0.2",
     "grunt": "^1.0.3",
     "grunt-browserify": "^5.3.0",
     "grunt-cli": "^1.2.0",