v1.6.0-rc.0

I currently do not have access to the Windows computer I was using for my major pymport-based project and I cannot fully test this version which will remain as RC for the time being

• macOS Apple Silicon prebuilt binaries
• Tested with Node.js 22 and 23
• Drop macOS 11 and 12 support
• Upgrade the built-in Python to 3.12.8
• Improved build of the built-in Python ensuring that all Python modules do not assume anything about the host system - including working SSL without requiring Homebrew on macOS
• Support rebuilding against Python 3.13
• Fix (and test) all compression modules on all platforms
• Recompiling the built-in Python now requires that conan>=2.0.0 is installed
• Fix #3, allow Python objects to be garbage-collected in fully synchronous code
• Fix #193, use the Node.js solution for cancelling exceptions thrown in a running asynchronous operation after the thread has been terminated
• Fix #324, reference counting error when accessing the Python constructor .constr