Please. Does anybody know why Lumen\'s team removed the command php artisan serve? That command was very helpful !.
Alternatively, you can try changing into the public folder of your Lumen application and running php -S localhost:8080. This definitely works on OS X - not sure about other platforms. You can also listen on port 80 but you will need to invoke the command with admin rights.
Although PHP's built-in web server was only added at version 5.4, Lumen requires PHP version 5.5.9 or higher, so this solution should work.