Merge pull request #172 from ipfs/fix-node-version

feat: Update allowed node versions to >= 4.2.2

Author: daviddias

package.json

@@ -16,7 +16,7 @@
     "wreck": "^7.0.0"
   },
   "engines": {
-    "node": "^4.0.0"
+    "node": ">=4.2.2"
   },
   "repository": {
     "type": "git",