chore(package): update npmpub to version 4.1.0

Closes #72

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "husky": "^0.14.0",
     "lint-staged": "^7.0.0",
     "npm-run-all": "^4.0.0",
-    "npmpub": "^3.1.0",
+    "npmpub": "^4.1.0",
     "nyc": "^11.0.0",
     "pify": "^3.0.0",
     "prettier": "^1.5.2",