Bump tzlocal from 1.5.1 to 2.0.0 in /requirements
Bump tzlocal from 1.5.1 to 2.0.0 in /requirements

Bumps [tzlocal](https://github.com/regebro/tzlocal) from 1.5.1 to 2.0.0.
- [Release notes](https://github.com/regebro/tzlocal/releases)
- [Changelog](https://github.com/regebro/tzlocal/blob/master/CHANGES.txt)
- [Commits](https://github.com/regebro/tzlocal/compare/1.5.1...2.0.0)

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