php artisan event:generate?

Just upgraded to Lumen 5.1 and I tried to run php artisan event:generate but the command could not be found.

The Lumen 5.1 docs mention it:

Need to queue an event listener? It couldn't be any easier. Simply add the ShouldQueue interface to the listener class. Listeners generated by the event:generate Artisan command already have this interface imported into the current namespace, so you can use it immediately

What am I missing? Pretty certain I updated all of the necessary files (did my best without an upgrade guide, as there does not appear to be one).