chore(package): update nyc to version 11.7.2

Closes #7

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "loopback-boot": "2.24.0",
     "loopback-component-explorer": "4.2.0",
     "mocha": "3.4.2",
-    "nyc": "11.0.2",
+    "nyc": "11.7.2",
     "semantic-release": "6.3.6",
     "strong-error-handler": "2.1.0"
   },