I'm working on this -- it will be a while till I get on Postgres (I really hope that's the managed DB you want), but I'd love to get you on the postgres beta list.
Postgres (and later some exciting flavors like Neon) is actually the only database I plan to support, at least for right now -- MySQL and MongoDB are not even on the roadmap really.
I might make an exception for RethinkDB since I loved it so dearly.
Don't get my hopes up... I haven't used RethinkDB in ages and have fully moved to Postgres though
But also...
Don't know who is behind it -- a company named MostlyTyped (not sure if this has old RDB engineers in it), but warms my heart that the repo is still seeing commits and usage.