Write integration tests

[bschmitt]

In order to make live easier when new Laravel and Lumen releases come out, we need integration tests. There tests should be integrated to Travis.

• Test consuming and publishing new messages
• Test bootstrapping with the most recent Laravel and Lumen
• Configuration
• ...

https://docs.travis-ci.com/user/database-setup/#RabbitMQ

Feel free to contribute

[mirkojotic]

@bschmitt I'd love to do this one. I have experience writing tests for Laravel projects but I've never tested a package. Do you have any time to kinda guide me through initial steps and give me a small push?

[stevenklar]

@mirkojotic maybe the Request or Message classes would be a good start for tests as they are not that heavy and are used by the "main" classes

[bschmitt]

@mirkojotic thank you very much for your support! I just merged your PR into the next release.