Bump pytz from 2019.3 to 2020.1
Bump pytz from 2019.3 to 2020.1

Bumps [pytz](https://github.com/stub42/pytz) from 2019.3 to 2020.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2019.3...release_2020.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
cfe-lab/MiCall,cfe-lab/MiCall,cfe-lab/MiCall