Update: a --delete option has been added, when specified on Drive, macOS & Windows it moves files to trash, on Linux it will permanently delete files.
Also a few folks also asked for a UI for macOS, so I also got a menubar (UI) app published on the Mac App Store which too uses the bundled open source dsync CLI. Updated: https://scaleninja.com/drivesync/
App Store link: https://apps.apple.com/app/drivesync-for-google-drive/id6813...