Automate deployment of npm and pypi module

[jordic]

Guillotina react is released as a package on npm but also as a pypi python package, with
a default guillotina runnable on installation.
We should automate the process to release it. currently it's something like:

python3.8 -m venv env
env/bin/python install -e .[dev]
cd gmi
yarn build
cp -r build/* guillotina_gmi/gmi/
env/bin/python setup.py sdist
env/bin/twine upload dist/*