chore(package): update np to version 5.0.3

Closes #8

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
         "@types/jsonfile": "~4.0.1",
         "@types/node": "^10.12.2",
         "@types/webpack-merge": "~4.1.3",
-        "np": "~3.0.4",
+        "np": "~5.0.3",
         "prettier": "~1.14.3",
         "tslint": "~5.11.0",
         "tslint-config-airbnb": "~5.11.0",