Add black dep

This MR adds black (code formatter) from the defaults channel as a runtime dependence.

enabled an automatic merge when the pipeline for 6d1dd6fa succeeds

added 6 commits

• 6d1dd6fa...5094e683 - 4 commits from branch master
• 93197856 - [conda] Add black code formatter as a dependence
• 76956548 - Use black from defaults

Compare with previous version

enabled an automatic merge when the pipeline for 76956548 succeeds

merged

mentioned in commit 38e56956