Update engines field in package.json

Author: TheDancingCode

package.json

@@ -35,8 +35,7 @@
     "vinyl": "^2.1.0"
   },
   "engines": {
-    "node": ">=0.10.0",
-    "npm": ">=1.2.10"
+    "node": ">=4"
   },
   "license": "MIT"
 }