Bump moment-timezone from 0.5.27 to 0.5.28

Bump moment-timezone from 0.5.27 to 0.5.28

Bumps [moment-timezone](https://github.com/moment/moment-timezone) from 0.5.27 to 0.5.28.
- [Release notes](https://github.com/moment/moment-timezone/releases)
- [Changelog](https://github.com/moment/moment-timezone/blob/develop/changelog.md)
- [Commits](https://github.com/moment/moment-timezone/compare/0.5.27...0.5.28)

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