Build isn't really passing

[jessarcher]

The builds at https://travis-ci.org/laravel-notification-channels/pusher-push-notifications show that the project is passing CI, but in actual fact the tests aren't being run!

No tests executed!

There are some warnings about the configuration file not passing validation, but I'm not sure if that's the actual cause for them not running.

I've checked out the project locally and run the tests, and found two of them are failing.

I'm looking at updating the library to use the Pusher Beams SDK, so I will try to fix these issues, but it's starting to look like a lot more more work than I'd anticipated.