Bump username from 5.1.0 to 7.0.0

Bumps [username](https://github.com/sindresorhus/username) from 5.1.0 to 7.0.0.
- [Release notes](https://github.com/sindresorhus/username/releases)
- [Commits](sindresorhus/username@v5.1.0...v7.0.0)

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

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