build(deps): bump codecov from 0.3.0 to 0.4.0 in /Library/Homebrew

Bumps [codecov](https://github.com/codecov/codecov-ruby) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/codecov/codecov-ruby/releases)
- [Changelog](https://github.com/codecov/codecov-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-ruby/compare/v0.3.0...v0.4.0

)

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