• CPython upgraded to 3.9.3 and 3.8.9.
• ctypes extension is now usable on more architectures (see #76).
• SQLite upgraded to 3.35.4.
• GCC upgraded to 10.3.0.
• Various tweaks to the build system to make dependency detection more robust.
• The Rust distribution verifier can now optionally run Python interpreter tests to validate distribution behavior.