Bump pytz from 2021.3 to 2022.1

Bumps pytz from 2021.3 to 2022.1.

Commits

• bd7b528 Bump version numbers to 2022.1/2022a
• 9150959 IANA 2022a
• 9e15fad Squashed 'tz/' changes from d2c79c4bc..e6150f292
• 2ed682a Add support for Python 3.10
• See full diff in compare view