updated docs

Author: JoshuaWise

docs/troubleshooting.md

@@ -2,7 +2,7 @@
 
 If you have trouble installing `better-sqlite3`, follow this checklist:
 
-1. Make sure you're using nodejs v8.11.4 or later
+1. Make sure you're using nodejs v8.9.4 or later
 
 2. Make sure you have [`node-gyp`](https://github.com/nodejs/node-gyp#installation) globally installed, including all of [its dependencies](https://github.com/nodejs/node-gyp#on-unix). On Windows you may need to [configure some things manually](https://github.com/nodejs/node-gyp#on-windows).