chore(package): update @commitlint/config-angular to version 8.0.0

Closes #54

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "@commitlint/cli": "^6.0.1",
-    "@commitlint/config-angular": "^6.0.2",
+    "@commitlint/config-angular": "^8.0.0",
     "@commitlint/prompt": "^6.0.1",
     "@commitlint/prompt-cli": "^6.0.1",
     "babel-cli": "^6.26.0",