chore(package): update cz-conventional-changelog to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "commitizen": "^3.1.1",
     "conventional-changelog-cli": "^2.0.21",
     "coveralls": "^3.0.4",
-    "cz-conventional-changelog": "^2.1.0",
+    "cz-conventional-changelog": "^3.0.0",
     "eslint-config-unity": "^1.0.1",
     "fake-indexeddb": "^2.1.1",
     "husky": "^2.5.0",