feat(nodejs): Increase Node.js memory limit

This is needed as the amount of data in WOF has grown
substantially.

Connects pelias/pelias#797

bin/start

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-exec node --max_old_space_size=6000 import.js
+exec node --max_old_space_size=8000 import.js