Apply fixes from StyleCI (musonza#216)

Direct convo updates (musonza#213)

* direct conversation updates

* Apply fixes from StyleCI (musonza#212)

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

Update README.md

Co-Authored-By: Simon <[email protected]>

Specificy sender fields (musonza#191)

* Allow specifying sender fields for queries

* Apply fixes from StyleCI (musonza#190)

Update composer.json (musonza#175)

* Update composer.json

* Update package requirements

* Apply fixes from StyleCI (musonza#176)

* Update php version requirement

Support laravel 6.0 (musonza#156)