chore(package): update nyc to version 13.3.0

Closes #77

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
     "eslint-plugin-markdown": "^1.0.0-beta.6",
     "jasmine": "^3.1.0",
     "jasmine-spec-reporter": "^4.2.1",
-    "nyc": "^11.7.1",
+    "nyc": "^13.3.0",
     "semantic-release": "^15.1.7",
     "travis-deploy-once": "^4.4.1"
   },