Are releases built by hand now? Should we automate?

[joshgoebel]

Would a GitHub action to auto-build releases whenever a new version is tagged be welcome? I know this is fairly trivial for at least Linux and Mac since I've already built for both. :)

Although also if only 2/3 of the release process was automated that might still be a win.

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Update: Pretty easy to build on Windows via GHA per #110 - at least x64/release... so building ALL the release zips with 0 user involvement is possibly within scope here... so we could have:

• Push the 0.4.0 tag
• CI is run and releases are automatically generated and attached to 0.4.0 release, etc.