This versioning scheme is consistent with other tools in the python ecosystem so it feels more natural and allows better interaction with other tools. fixes #346
* add support to install pypy * resolved comments, update readme, add e2e tests. * resolve throw error * Add pypy unit tests to cover code * add tests * Update test-pypy.yml * Update test-python.yml * Update test-python.yml * Update README.md * fixing tests * change order Co-authored-by: Maxim Lobanov <v-malob@microsoft.com> * add pypy tests and fix issue with pypy-3-nightly Co-authored-by: Maxim Lobanov <v-malob@microsoft.com>