Bump magnus from 0.6.3 to 0.6.4

Bumps [magnus](https://github.com/matsadler/magnus) from 0.6.3 to 0.6.4.
- [Release notes](https://github.com/matsadler/magnus/releases)
- [Changelog](https://github.com/matsadler/magnus/blob/0.6.4/CHANGELOG.md)
- [Commits](matsadler/magnus@0.6.3...0.6.4)

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

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