final tidying commit for 6.1.1

Merge pull request RDFLib#1517 from aucampia/iwana-20211218T0100-test…

…_guidelines

Update the guidelines for writing tests

6.0.2 release docco RDFLib#2

version set to 6.0.1

blacked everything

moving 5.0.0 tag to include readthedocs fixes

version 4.2.2

version 4.2.1

Merge pull request RDFLib#455 from joernhees/release_4.2.0

Release 4.2.0

v4.1.2