postgres: Fix CI's postgres version detection
postgres: Fix CI's postgres version detection

This broke insert_id() because it expects a 'server' key in the
returned array yet no array is returned.

This should work just fine for postgres >7.4 now.

Signed-off-by: Florian Pritz <753f544d2d01592750fb4bd29251b78abcfc8ecd@xinu.at>

jreinert/filebin,Bluewind/filebin,Bluewind/filebin,jreinert/filebin,Bluewind/filebin,jreinert/filebin,Bluewind/filebin,jreinert/filebin,jreinert/filebin,jreinert/filebin,Bluewind/filebin