Where does one find the latest version of Postgres that can be used with flyway-play?

[dnk8n]

Version I am using:

    "org.flywaydb" %% "flyway-play" % "5.3.2",

I am particularly interested in one of the versions supported by RDS.

I get this warning on one of my apps:

[warn] o.f.c.i.d.b.Database - Flyway upgrade recommended: PostgreSQL 11.4 is newer than this version of Flyway and support has not been tested.

Couldn't that warning also be useful and tell us which version is the latest to be tested!?