fix: CI is currently failing on master

[curita]

Issue

Newly opened PRs are failing in their Python 3.10 build (reference).

Cause

This looks to be caused by the black check, which in its latest version introduced some new rules (removing new lines after class and function declarations, adding trailing commas to the last elements of iterables, etc.).

Proposal

To avoid these errors from happening, we could run the latest version of black over the whole codebase and/or pin its version.

[VMRuiz]

@kmike Suggested using pre-commit instead
Example from Scrapy: https://github.com/scrapy/scrapy/blob/master/.pre-commit-config.yaml

[rennerocha]

pre-commit is a good improvement into the project. I am using in all my current projects.
We can add a pre-commit run --all call in the build, so it will fail if the formatting (and other tests) fail, avoiding us to commit code that doesn't match.
Probably it will require one big commit to format the entire project once.

[VMRuiz]

The project is already formatted with Black, and only a few files needs to be reformatted with the new rules of black 23.1.0 so introducing this won't cause a huge diff.