Update README.md

Update MessageService.php (musonza#225)

Apply fixes from StyleCI (musonza#216)

Apply fixes from StyleCI (musonza#216)

Direct convo updates (musonza#213)

* direct conversation updates

* Apply fixes from StyleCI (musonza#212)

Apply fixes from StyleCI (musonza#216)

Adds ability to use any Laravel model as Chat participant (musonza#163)

* Adding multiple model recipients

Merge branch 'multiple-model-recipients' of https://github.com/musonz…

…a/chat into multiple-model-recipients

Apply fixes from StyleCI (musonza#203)

Merge branch 'model-transformers' into multiple-model-recipients