wrappings for python 3.9 not in pypi

[Pablo Hernandez-Cerdan]

https://pypi.org/project/itk-totalvariation/#files

[Matt McCormick]

This will be addressed with #42

[Matt McCormick]

@phcerdan if you want to do the honors, adding a v0.2.1 tag will push the packages to PyPI.

[Pablo Hernandez-Cerdan]

Not sure if I did it all right, I manually created a release (from Github interface) with the tag v0.2.1

[Pablo Hernandez-Cerdan]

Thanks @thewtex!