chore(package): update np to version 6.2.3

Closes #18

Author: greenkeeper[bot]

package.json

@@ -67,7 +67,7 @@
     "jest": "^24.9.0",
     "jest-config": "^24.9.0",
     "lodash.camelcase": "^4.3.0",
-    "np": "^5.1.1",
+    "np": "^6.2.3",
     "prettier": "^1.14.3",
     "prompt": "^1.0.0",
     "replace-in-file": "^4.1.3",