v2.16.0

• ✨ Add the ability to pass additional flags to a build frontend through the CIBW_BUILD_FRONTEND option (#1588).
• ✨ The environment variable SOURCE_DATE_EPOCH is now automatically passed through to container Linux builds (useful for reproducible builds!) (#1589)
• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0rc2 (#1604)
• 🐛 Fix requires_python auto-detection from setup.py when the call to setup() is within an if __name__ == "__main__" block (#1613)
• 🐛 Fix a bug that prevented building Linux wheels in Docker on a Windows host (#1573)
• 🐛 --only can now select prerelease-pythons (#1564)
• 📚 Docs & examples updates (#1582, #1593, #1598, #1615)