Bump Black version for real#1434

Merged

ashleysommer merged 2 commits intoRDFLib:masterfrom

ashleysommer:update_black

Oct 11, 2021

Commits on Oct 10, 2021

Update black to latest version, to avoid a bug that was in 21.6b0 and 21.7b0 releases.
ashleysommer
committed

Commits on Oct 11, 2021

Merge remote-tracking branch 'origin/master' into update_black
ashleysommer
committed