poudriere 12.0R amd64 & 13.0-CURRENT amd64 OK, waiting on the
I still think it's worth bumping the PORTREVISION to ensure everything
is rebuilt correctly. Erlang is picky about this, as explicit versions
are bound into the runtime configuration.
The original intent was to get this change sorted out before 2019Q3
starts which maximises time for users to get their stuff sorted.