chore(publish): change to npm whitelist to exclude unnecessary files (#212)

Author: danez

.npmignore

@@ -10,6 +10,10 @@
   "bin": {
     "react-docgen": "bin/react-docgen.js"
   },
+  "files":[
+    "bin",
+    "dist"
+  ],
   "main": "dist/main.js",
   "scripts": {
     "check": "npm run lint && npm run flow && npm test",