fix: install arm brew on MacOS Arm to install libsodium

[aminya]

#529

[Bartel-C8]

I did some fixes/changes: Bartel-C8@188cc3a

With the install step, I still get warnings, somewhere the ARCH isn't passed on properly there:

ld: warning: ignoring file /Users/bartel/git/zeromq.js/build/libzmq/lib/libzmq.a, building for macOS-x86_64 but attempting to link with file built for macOS-arm64
ld: warning: ignoring file /Users/bartel/arm-target/Cellar/libsodium/1.0.18_1/lib/libsodium.dylib, building for macOS-x86_64 but attempting to link with file built for macOS-arm64

Prebuild is okay now (untested binary, I don't have an ARM machine):

  SOLINK_MODULE(target) Release/zeromq.node
rm 7722eaf02fcc073df28ffd1fa831e71544edfd42.intermediate
gyp info ok 

[Bartel-C8]

Fixed pnpm install as well: Bartel-C8@af8f5c4

On re-install (run ARCH=arm64 pnpm install again) you get a warning:

dlopen(/Users/bartel/git/zeromq.js/build/Release/zeromq.node, 0x0001): tried: '/Users/bartel/git/zeromq.js/build/Release/zeromq.node' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')), 
'/System/Volumes/Preboot/Cryptexes/OS/Users/bartel/git/zeromq.js/build/Release/zeromq.node' (no such file), '/Users/bartel/git/zeromq.js/build/Release/zeromq.node' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64'))

But that's because of the dlopen is the one of nodejs, which is in my case a x86_64 built.

[aminya]

Thanks for the changes. I have merged your suggestions.