update the version number in VERSION with calver: yy.mm.dd
python setup.py sdist upload -r pypi

TEST: 
open new terminal
mkvirtualenv adf
pip install cppimport
cd ~/projects/cppimport/tests
python -c 'import cppimport; assert(cppimport.imp("mymodule").add(1,2) == 3);'

GIT:
git commit -m "yy.mm.dd" 
git push
git tag yy.mm.dd
git push origin yy.mm.dd
create release on github

TODO: 
automate most of this via github actions
