chore: drop support for Node.js 0.10

BREAKING CHANGE: This module no longer supports Node.js 0.10

Author: greenkeeperio-bot

package.json

@@ -16,7 +16,7 @@
   },
   "licenses": "MIT",
   "engines": {
-    "node": ">= 0.10.26"
+    "node": ">= 4"
   },
   "scripts": {
     "test": "gulp test"