Dev/hshami/support py38 and py39 (Azure#523)

* introducing PY38 and PY39

fix version number errors - remove dashes

Lock simulator version (Azure#524)

* Lock simulator version

* Update changelog with version number

update pypi docker versions (Azure#510)

* update docker version 5.0.0 and docker-compose 1.29.1

* changelog and version change

* update release version to 3.3.1

update version number

update tags

remove debug messages

update release version

remove rc tag

Update iotedgedev 3.1.0 tags