chore: update dependency conventional-changelog-angular to v1.6.0 (#216)

Author: renovate[bot]

@commitlint/core/package.json

@@ -63,7 +63,7 @@
     "babel-preset-commitlint": "^5.2.0",
     "babel-register": "6.26.0",
     "concurrently": "3.5.1",
-    "conventional-changelog-angular": "^1.3.3",
+    "conventional-changelog-angular": "1.6.0",
     "cross-env": "5.1.1",
     "execa": "0.8.0",
     "globby": "6.1.0",