[Python]: Bump pyvips from 2.2.1 to 2.2.2 in /requirements

[dependabot[bot]]

Bumps pyvips from 2.2.1 to 2.2.2.

Changelog

Sourced from pyvips's changelog.

Version 2.2.2 (released 4 Jan 2023)

• fix with libvips nodeprecated [kleisauke]
• update README notes for py3.8+ on win [CristiFati]
• fix VipsObect.print_all() [jcupitt]
• add split, join, annotate animation examples [jcupitt]
• work around broken ffi bool type [amtsak]
• flag classes are now integer-valued so you can OR them [jcupitt]
• update docs for 8.15 [jcupitt]

Commits

• 88f1d45 update readme
• a9688b9 add docs update note to CHANGELOG
• 92172a6 update docs for 8.15
• eb04a24 fix docs for latest sphinx
• ca2538d Regenerate enums for upcoming libvips 8.15 (#430)
• 7770412 flags are now int valued
• c90b657 Improve support for GFlags types (#429)
• 4e60225 Test with Python 3.11 (#401)
• e8f26b6 add macOS install notes
• b7cceeb note ~/.local
• Additional commits viewable in compare view

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[Mischback]

@dependabot merge