Nightly snapshot builds

I'm pleased to say that we now have automated nightly snapshot builds (Windows, macOS, Python Wheel and source code) available at: https://www.postgresql.org/ftp/pgadmin/pgadmin4/snapshots/

If you're using one of these, please bear in mind that they have had no QA (beyond automated and developer testing at commit time). If reporting an issue, please be clear which snapshot you're using.

The system will keep the 5 most recent builds at any time.

Thanks!
--