Pyrsmq

- Require Python 3.6+
- Code cleanup
- Fix for scenario where consumer breaks if redis is restarted (4)

Re-release of 0.4.4 as that never made it to PyPi

* Allow extending the transaction for deleteMessage to perform other actions in same transaction ([9](https://github.com/mlasevich/PyRSMQ/issues/9)) (yehonatanz)
* Use redis timestamp in milliseconds instead of local in seconds ([11](https://github.com/mlasevich/PyRSMQ/pull/11)) (yehonatanz)
* Convert queue attributes to numbers when elligible ([12](https://github.com/mlasevich/PyRSMQ/pull/12)) (yehonatanz)

* v0.4.3
* Don't encode sent message if it is of type bytes (6) (yehonatanz)
* Allow delay and vt to be float (round only after converting to millis) (7) (yehonatanz)
* Convert ts from str/bytes to int in receive/pop message (8) (yehonatanz)