Unable to build on macOS

[xJonathanLEI]

When building on macOS in a GitHub Actions workflow with cargo build, an error occurs:

  cargo:warning=lib/starkware-crypto/src/starkware/crypto/ffi/utils.cc:1:10: fatal error: 'endian.h' file not found
  cargo:warning=#include <endian.h>
  cargo:warning=         ^~~~~~~~~~
  exit status: 0
  running: "c++" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-arch" "x86_64" "-static" "-I" "lib/starkware-crypto/src" "-Wall" "-Wextra" "-std=c++17" "-Werror" "-Wall" "-Wextra" "-fno-strict-aliasing" "-fPIC" "-o" "/Users/runner/repos/starknet-rs/target/debug/build/starkware-crypto-sys-7e7a1853b703c604/out/lib/starkware-crypto/src/starkware/crypto/pedersen_hash.o" "-c" "lib/starkware-crypto/src/starkware/crypto/pedersen_hash.cc"
  cargo:warning=1 error generated.
  exit status: 1
  exit status: 0
  exit status: 0

  --- stderr

[xJonathanLEI]

After some local testing it seems that starkware-libs/crypto-cpp#4 is working quite well. Before that PR is merged I'm gonna fix this issue by switching the upstream to that fork.