DEP(deps): Update pytz requirement from ~=2022.1 to ~=2022.2

[dependabot[bot]]

Updates the requirements on pytz to permit the latest version.

Commits

• b247b50 Remove obsolete Travis config
• c7cf378 Bump version numbers to 2022b/2022.2
• d0d613c Europe/Belfast changes move it to common_timezones
• be677ab Enable full PACKRATDATA for timestamp backwards compatibility
• fbe098e IANA 2022b
• 301a880 Squashed 'tz/' changes from 95ecc37d2..32a4af56f
• 14f33bf Use documented os.sep instead of os.path.sep
• See full diff in compare view

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