chore(package): update rollup-plugin-node-resolve to version 4.2.1

Closes #25

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "rollup": "^0.64.0",
     "rollup-plugin-babel": "^4.0.0-beta.4",
     "rollup-plugin-babel-minify": "^5.0.0",
-    "rollup-plugin-node-resolve": "^3.3.0"
+    "rollup-plugin-node-resolve": "^4.2.1"
   },
   "author": "Can Göktas <can.goektas@gmail.com>",
   "license": "MIT",