Update twine requirement from <6 to <7

Updates the requirements on [twine](https://github.com/pypa/twine) to permit the latest version.
- [Release notes](https://github.com/pypa/twine/releases)
- [Changelog](https://github.com/pypa/twine/blob/main/docs/changelog.rst)
- [Commits](pypa/twine@1.3.0...6.0.1)

---
updated-dependencies:
- dependency-name: twine
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -69,7 +69,7 @@
               'build<2',
               'bump2version==1.0.1',
               'poethepoet<0.30',
-              'twine<6',
+              'twine<7',
           ],
           'service': [
               'responder @ git+https://github.com/kennethreitz/responder.git@e9613500daf',