Changes proposed in this pull request:

• The latest PyPy supports 3.11 but no longer 3.10
• A future cibuildwheel release will remove PyPy 3.10 from the default (Move PyPy 3.10 to pypy-eol pypa/cibuildwheel#2521) but for now let's explicitly skip it
• Let's remove PyPy 3.9 from the skip to avoid a warning:

  • cibuildwheel: Invalid skip selector: 'pp39*'. This selector matches a group that wasn't enabled. Enable it using the enable option or remove this selector. This selector will have no effect.