Precompiled binaries in GitHub releases for Darwin/Linux x86_64 and aarch64

# Feature request

Ship more pre-compiled binaries via GitHub releases e.g. https://github.com/AGWA/git-crypt/releases/tag/0.7.0

If compression is used; please use gzip or tar.gz. Though any streaming compressor works for me so long as it is common in Linux.

# Additional information

* Modern Darwin/MacOS has CPU architectures: x86_64 and arm64. Sometimes MacOS misreports `arch` utility with `i386` if you call its 32-bit variant but the system itself is still x86_64.
* Linux: x86_64 and aarch64 (many others but I'm only asking for these two)

I prefer to obtain binary packages from original projects when they provide them via GitHub releases. If you shipped with these packages I'd likely obtain them directly from you as opposed to 3rd party sources (package managers e.g. homebrew).