Pre-commit configuration for black formatter

[krestenlaust]

Having pre-commit set-up would allow contributors to easily configure black formatter to run before every commit.

Though I haven't been able to get it working on my (windows) machine.

[codecov]

Codecov Report

Merging #387 (0431489) into next (4c9a790) will not change coverage.
The diff coverage is n/a.

❗ Current head 0431489 differs from pull request most recent head fa13dab. Consider uploading reports for the commit fa13dab to get more accurate results

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[ThomasBow]

@krestenlaust review changes

[krestenlaust]

@ThomasBow will you be able to add something short to the readme about installing the pre-commit hook?

[ThomasBow]

@ThomasBow will you be able to add something short to the readme about installing the pre-commit hook?

That is probably a good idea