[Fixes #371] Add Github Actions CI pipeline

[ADI10HERO]

fixes #371

This patch adds GitHub actions CI pipeline.

CI pipeline:

• Creates multiple environments
• Installs requirements and HUB
• Lints code with Black
• Runs pytest and codecov

[github-actions]

Locust summary

Git references

Initial: 76ab210
Terminal: 3a09cb6

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[codecov]

Codecov Report

Merging #372 (a869971) into master (3fdea4c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #372   +/-   ##
=======================================
  Coverage   89.25%   89.25%           
=======================================
  Files          53       53           
  Lines        3881     3881           
=======================================
  Hits         3464     3464           
  Misses        417      417           

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[davidbuniat]

This looks great! @ADI10HERO we need to this all fixed, let us know how we can help to make all the checks.

• add credentials for s3, azure, GCP to be able to test those external services, feel free to point me where to add those creds and I will do it similar to CircleCI
• To fix the issues, @edogrigqv2 do you think we should get rid of lmdb dependency?
• ubuntu 64x has this issue AttributeError: module 'hub.api' has no attribute 'objectview'
• AttributeError: module 'numcodecs' has no attribute 'MsgPack'
• c:\hostedtoolcache\windows\python\3.7.9\x64\lib\posixpath.py:248: ModuleNotFoundError on windows
• assertion errors on windows regarding in unit8
• ModuleNotFoundError: No module named 'pwd' not found on windows
• More issues.

[Anselmoo]

@ADI10HERO there are two points, which I want to add:

1. Why are you running once with and without optional dependencies the same test because it pyetest runs in both cases the exactly the same tests. I would recommend if that not cause some of your fail tests.
2. Also I can recommend adding https://github.com/darrenburns/pytest-clarity which provides a better visualization of the fail tests.

[davidbuniat]

We removed 3.9 and pytests in order to test installation on cross-platform. @Anselmoo will add two feature requests to make sure Hub is properly working across all OS and 3.9 python.