Support Python 3.8 - Githubissues

To-do items include:

[ ] Fix warning in tests for deprecated method (pasted below)
[ ] Add tests in tox and update build pipelines for 3.8
[ ] Consider adding badges for support on docs page (link here)

Mentioned warning below:

env37/lib/python3.7/site-packages/cli_helpers/packages/tabulate.py:6
  /Users/ellbosch/Repos/mssql-cli/env37/lib/python3.7/site-packages/cli_helpers/packages/tabulate.py:6: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
    from collections import namedtuple, Iterable

-- Docs: https://docs.pytest.org/en/latest/warnings.html

dbcli / mssql-cli

Support Python 3.8 #343