Bump semver from 2.13.0 to 3.0.4

Bumps [semver](https://github.com/python-semver/python-semver) from 2.13.0 to 3.0.4.
- [Release notes](https://github.com/python-semver/python-semver/releases)
- [Changelog](https://github.com/python-semver/python-semver/blob/master/CHANGELOG.rst)
- [Commits](python-semver/python-semver@2.13.0...3.0.4)

---
updated-dependencies:
- dependency-name: semver
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Pipfile

@@ -7,7 +7,7 @@ name = "pypi"
 flask = "*"
 "ruamel.yaml" = "*"
 pygithub = "*"
-semver = "==2.13.0"
+semver = "==3.0.4"
 python-gitlab = "*"
 gunicorn = "*"