[🐛 BUG] - can't build on windows

[stevenhurwitt]

Describe the bug
the repo will not build out of the box on windows

To Reproduce

1. be on windows
2. git clone, yarn install, ctrl+shift+b
3. get this error

• writing effective config  file=dist\builder-effective-config.yaml
  ⨯ Build for macOS is supported only on macOS, please see https://electron.build/multi-platform-build
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! gdesktopsuite@0.3.2 build: `electron-builder -mwl -p never`
npm ERR! Exit status 1

Expected behavior
compiled & built desktop app

G Desktop Suite:

• latest

Platform:

• OS: Windows
• Version: most recent insiders build (20H2?)

[stevenhurwitt]

turns out i can't build it on macosx either, with a different error:

⨯ /Volumes/samsung/G-Desktop-Suite/node_modules/app-builder-bin/mac/app-builder exited with code 

ERR_ELECTRON_BUILDER_CANNOT_EXECUTE  stackTrace=
Error: /Volumes/samsung/G-Desktop-Suite/node_modules/app-builder-bin/mac/app-builder exited with code 

ERR_ELECTRON_BUILDER_CANNOT_EXECUTE
at ChildProcess.<anonymous> (/Volumes/samsung/G-Desktop-Suite/node_modules/builder-util/src/util.ts:243:14)
at Object.onceWrapper (events.js:422:26)
at ChildProcess.emit (events.js:315:20)
at maybeClose (internal/child_process.js:1021:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:286:5)

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! gdesktopsuite@0.3.2 build: `electron-builder -mwl -p never`
npm ERR! Exit status 1