Shed Skin v0.9.7

• Use CMake to generate output binaries (Shakeeb Alireza)
• Native Windows support! (using cmake and conan; Shakeeb Alireza)
• Dropped blessings/progressbar/jinja dependencies (Shakeeb Alireza)
• Various minor C++ improvements/fixes (Folkert van Heusden)
• mmap ContextManager support (Humhue)
• Basic support for f-strings (no format specifiers)
• Support relative imports
• Support walrus operator
• Support struct.{unpack_from, pack_into}
• Support unpacking from iterables
• Fix bytes.contains(bytes)
• Add DOOM-engine example (1 FPS -> 60 FPS)
• Prettify cpp tuple types ("tuple2<T,T>" -> "tuple")
• Set {Exception, BaseException}.class
• Various minor other fixes and improvements
• ...