Adding Black styling

[AhmetCanSolak]

We need to add https://github.com/psf/black to our project to keep styling consistent. Also it is very useful to have black as a pre-commit hook to make sure no contributor skipping black while committing.

Recommended pyproject.toml given below:

[tool.black]
target-version = ['py36', 'py37']
skip-string-normalization = true

[AhmetCanSolak]

#56 works well, I tested, closing this issue, thank you @ljjh20

[edyoshikun]

@AhmetCanSolak is there a reason why we want to have those target versions?
I'm having issues fixing my black formatting on #148 given the current .toml configuration.

[tool.black]
line-length = 79

[tool.isort]
profile = "black"
line_length = 79

[AhmetCanSolak]

Target versions are there for legacy reasons. Addressing here: #150, please review then we can merge quickly

[AhmetCanSolak]

#150 is merged, let me know if I can do anything else @edyoshikun , if nothing feel free to close this issue.