Bump pytz from 2020.4 to 2020.5
Bump pytz from 2020.4 to 2020.5

Bumps [pytz](https://github.com/stub42/pytz) from 2020.4 to 2020.5.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2020.4...release_2020.5)

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