added assets/js to static files copier, not sure why this was missing but it made developing javascript annoying

Author: Gottwik

libs/build_tools/assets_copier.js

@@ -16,7 +16,7 @@ const flat_helpers = require(enduro.enduro_path + '/libs/flat_db/flat_helpers')
 const logger = require(enduro.enduro_path + '/libs/logger')
 
 // defines locations that have static files
-const static_locations_to_watch = ['assets/img', 'assets/vendor', 'assets/fonts', 'assets/admin_extensions', 'remote']
+const static_locations_to_watch = ['assets/js', 'assets/img', 'assets/vendor', 'assets/fonts', 'assets/admin_extensions', 'remote']
 
 // * ———————————————————————————————————————————————————————— * //
 // * 	init