Extract version from pyproject.toml

[mikeywaites]

The release-drafter.yml workflow will now automatically extract the version from pyproject.toml

References

• TODO

Submitter checklist

• The PR request is well described and justified, including the body and the references
• The PR title represents the desired changelog entry
• The repository's code style is followed (see the contributing guide)
• Test coverage that demonstrates that the change works as expected
• For new features, there's necessary documentation in this pull request or in a subsequent PR to wiremock.org