Add nyc --check-coverage

Author: ehmicky

package.json

@@ -11,7 +11,7 @@
     "test": "gulp test",
     "prepublishOnly": "npm test",
     "release": "release-it",
-    "ci-test": "nyc npm test && coveralls <coverage/lcov.info"
+    "ci-test": "nyc --check-coverage --statements 100 --lines 100 --functions 100 --branches 100 npm test && coveralls <coverage/lcov.info"
   },
   "description": "Log all process errors: uncaught exceptions, warnings and improperly handled promises",
   "keywords": [