header-only Windows implementation of the <unistd.h> header.
tested on the following compilers:
- Visual Studio
- Clang for Windows (clang-cl)
- GCC (MinGW)
implements the following functions:
- access
- chdir
- close
- dup
- dup2
- execl
- execle
- execlp
- execp
- execpe
- execpp
- rmdir
- unlink