fix: relax node engine (#708)

Author: evilebottnawi

package.json

@@ -63,7 +63,7 @@
     "chokidar": "^2.1.6"
   },
   "engines": {
-    "node": ">= 6.9.0 || >= 8.9.0"
+    "node": ">= 6.9.0"
   },
   "peerDependencies": {
     "webpack": "^3.0.0 || ^4.0.0"