fix(electron): issue updating Mac App

[sboesen]

This PR fixes just the package.json config to re-enable ZIP target on Mac builds, which should re-enable auto-update on Mac.

Fixes #749

Note: Issue #749 references an error popup, but was originally about auto update on Mac being broken, which this fixes.

#722 appears to reference that same error popup in #749, and is still not fixed.

[sboesen]

This issue should be reopened, I suspect auto-update now works for M1 macs but after testing from Athens Beta 52 on an Intel mac it downloads the ARM64 update of Beta 53 by default, breaking the current Athens installation.

Current workaround for Intel Macs is to click "Cancel" during update prompt and wait for fix.

I suspect this may be a bug/feature gap in electron-updater after reviewing the relevant code introduced in the most recent electron-builder release 22.10.5 in an attempt to fix auto-update for M1 macs (code here, relevant PR describing the issue were trying to fix) and I'm still looking to see if there's something we can do to avoid this issue or if we need to roll back electron-builder to 22.10.4 (which doesn't include these filters).

Will be testing on my own S3 bucket to see if I can get this working, should have an update later today or tomorrow morning. We'll definitely want to make sure that this works on M1 macs too after the change (and doesn't download the Intel version), something I'm unfortunately still limited in testing.

[tangjeff0]

@sboesen created a new issue for this #793. Someone encountered the issue with x64 -> arm. My M1 was able to auto-update, so that was tested. By the way, you can create a local AWS server with Minio. See docs here: https://github.com/athensresearch/athens/pull/750/files. I recommend using yarn update to easily create a new tagged release, which is how electron determines a new update is available.