Update package.json

Author: antialias

package.json

@@ -15,10 +15,8 @@
     "index.js"
   ],
   "dependencies": {
-    "chownr": "^1.0.1",
     "clone": "^1.0.2",
     "concat-stream": "^1.5.2",
-    "concat-stream": "^1.4.6",
     "graceful-fs": "^4.1.6",
     "mkdirp": "^0.5.0",
     "normalize-package-data": "~1.0.1 || ^2.0.0",