[chore] Release 4.1 

[chore] Release 4.0 (darrachequesne#52) 

[chore] Release 3.1 (darrachequesne#46) 

[chore] Release 3.0 (darrachequesne#40) 

[chore] Release 2.6 

Release 2.5 

Release 2.4 

Merge pull request darrachequesne#17 from darrachequesne/patch-4 Release 2.3