Automate release on PyPI

[brodokk]

When a project that uses this module with a software like poetry to manage its dependency, they can conflict with the version of fastapi of the project, if different.

To avoid this problem it would be good to have a more automated release. (As understood in issue #183)

At the same time to anyone who requires to use poetry or any tool like that, a solution is to simply install via the master branch. (Which could be considered as stable based on the information in issue #183 at the time to write this issue)