chore(package): set engine to node 4

SimenB · web-flow · commit 851881186c21 · 2018-02-11T17:41:34.000+01:00
diff --git a/package.json b/package.json
@@ -12,7 +12,7 @@
   },
   "files": ["docs/", "rules/", "processors/", "index.js"],
   "engines": {
-    "node": ">= 6"
+    "node": ">= 4"
   },
   "peerDependencies": {
     "eslint": ">=3.6"
