Use windows-latest instead of windows-2016 for CI builds

Release 4.5.5

- bugfix release, needed for compatibility with pytest 7.0

Release 4.5.4

- minor bugfix release

Release 4.5.3

- reverts a change in the previous release that could cause a regression

Release 4.5.2

- this is a bugfix release

Release version 4.5.1

- this is a bugfix release

Release 4.5.0

- adds some support for Python 3.10 and basic type checking

Release 4.4.0

Release 4.3.3

Release 4.3.2