Support non PEP440 version like 0.4.1-p1

https://gitlab.teklia.com/callico/callico/-/jobs/549787 failed because it has an old tag 0.4.1-p1 which is no longer supported by packaging as of version 22. GitLab might support it, in the sense that they might be sorted (we need to test the new version ordering) in #11 (closed)

For now, I introduced support for this kind of versions by replacing p by post in the tag name.