set Black formatting

[Borda]

Before submitting

• [x] Was this discussed/approved via a Github issue? (no need for typos and docs improvements)
• [x] Did you make sure to update the docs?
• [ ] Did you write any new necessary tests?

What does this PR do?

Switch from YAPF to black formating

PR review

Anyone in the community is free to review the PR once the tests have passed. If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[codecov[bot]]

Codecov Report

Merging #29 (c211628) into master (af83b98) will not change coverage. The diff coverage is n/a.

:exclamation: Current head c211628 differs from pull request most recent head 8db4acf. Consider uploading reports for the commit 8db4acf to get more accurate results

Additional details and impacted files

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