chore(package): update nyc to version 12.0.1

Author: greenkeeper[bot]

package.json

@@ -74,7 +74,7 @@
     "moment": "^2.21.0",
     "node-watch": "^0.5.8",
     "npm-run-all": "^4.1.2",
-    "nyc": "^11.4.1",
+    "nyc": "^12.0.1",
     "raw-loader": "^0.5.1",
     "rxjs": "^5.5.6",
     "shelljs": "^0.8.1",