Add black formatter

[JoranAngevaare]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 5177576193

• 14 of 44 (31.82%) changed or added relevant lines in 6 files are covered.
• 23 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.003%) to 38.328%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
optim_esm_tools/analyze/analyze.py	1	3	33.33%
optim_esm_tools/synda_files/format_synda.py	2	6	33.33%
optim_esm_tools/utils.py	2	7	28.57%
optim_esm_tools/analyze/cmip_handler.py	5	24	20.83%

Files with Coverage Reduction	New Missed Lines	%
optim_esm_tools/synda_files/format_synda.py	1	43.62%
optim_esm_tools/synda_files/synda_files.py	1	87.76%
optim_esm_tools/utils.py	3	25.96%
optim_esm_tools/analyze/cmip_handler.py	18	20.07%

Totals
Change from base Build 5177387752:	0.003%
Covered Lines:	243
Relevant Lines:	634

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💛 - Coveralls