Merge pull request #28 from NodeOS/greenkeeper-prebuild-install-2.1.0

Update prebuild-install to version 2.1.0 🚀

Author: piranna

package.json

@@ -52,7 +52,7 @@
     "async": "^2.1.2",
     "download-manager": "^0.1.3",
     "fs-extra": "^1.0.0",
-    "prebuild-install": "1.0.2"
+    "prebuild-install": "2.1.0"
   },
   "devDependencies": {
     "prebuild": "^5.0.3"