Prior to this, at least on Linux/MacOS/etc, I guess it was not possible
to compile with Zstd included for `hex::dec::zstd_decompress()`:
Every other target lib for the decompression plugin would compile,
**except for** Zstd. Additionally, the target name `zstd` caused CMake
to not be able to find `Find(ZSTD).cmake` due to case-sensitivity
differences between Windows and Unix-based file paths, of course.
With that said, I'm not too sure if this will break building w/ Zstd on
Windows... Hopefully not 😄
