Pytest-molecule

Changes

* Remove delegated special treatment (47) ssbarnea
* travis: refactored and added py38 testing (46) ssbarnea

Changes

* github: enable release drafter (44) ssbarnea
* Temporary disable DeprecationWarning during collection (43) ssbarnea

Solves several installation issues.

* adopt new molecule api
* avoided error with more-itertools on Ubuntu with python 2.7

* Docker presence is now optional
* Discovered scenarios area added markers with driver name
* Added option for controlling what to do when a driver is not available

This new release only enables users to pass arguments to molecule.