Log Message:
py-cryptodome: updated to 3.9.3

3.9.3:
* Align stack of functions using SSE2 intrinsics to avoid crashes,
  when compiled with gcc on 32-bit x86 platforms.

3.9.2:
New features
* Add Python 3.8 wheels for Mac.

Resolved issues
* Avoid allocating arrays of ``__m128i`` on the stack, to cope with buggy compilers.
* Remove blanket ``-O3`` optimization for gcc and clang, to cope with buggy \ 
compilers.
* Fix typing stubs for signatures.
* Deal with gcc installations that don't have ``x86intrin.h``.