Try: build zip and dmg for mac target

[codebykat]

Fix

Potential fix for auto-updating not working on the mac, see: electron-userland/electron-builder#2199

Test

TBD

Release

TBD

[belcherj]

OSX auto-update will be broken till this gets fixed: electron-userland/electron-builder#4299

[belcherj]

Error: Error: ZIP file not provided: [
{
"url": "https://github.com/Automattic/simplenote-electron/releases/download/v1.18.0/Simplenote-macOS-1.18.0.dmg",
"info": {
"url": "Simplenote-macOS-1.18.0.dmg",
"sha512": "CbGVuTJgNE1XjCNMu21hDHMIkfakcQ7apujhXL5iEtAD8R1+HpcXtz1z+p8Dfd0RmZTijir96LNGsSAlO1mn3A==",
"size": 86451503
}
}
]
at newError (/Applications/Simplenote.app/Contents/Resources/app.asar/node_modules/builder-util-runtime/out/index.js:212:17)
at MacUpdater.doDownloadUpdate (/Applications/Simplenote.app/Contents/Resources/app.asar/node_modules/electron-updater/out/MacUpdater.js:83:48)
at MacUpdater.downloadUpdate (/Applications/Simplenote.app/Contents/Resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:567:19)
at MacUpdater.doCheckForUpdates (/Applications/Simplenote.app/Contents/Resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:527:49)
at processTicksAndRejections (internal/process/task_queues.js:85:5)