Bump simplecov from 0.19.1 to 0.21.1 (#2106)
Bump simplecov from 0.19.1 to 0.21.1 (#2106)

Bumps [simplecov](https://github.com/simplecov-ruby/simplecov) from 0.19.1 to 0.21.1.
- [Release notes](https://github.com/simplecov-ruby/simplecov/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov/blob/main/CHANGELOG.md)
- [Commits](https://github.com/simplecov-ruby/simplecov/compare/v0.19.1...v0.21.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
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