stick to postgres 13 for dev db

(ili2pg doesn't support scram authentication, which is default
in postgres 14 it seems, see claeis/ili2db#448
for more info)

qgepqwat2ili/utils/various.py

@@ -83,7 +83,7 @@ def dexec_(cmd, check=True):
         logger.info("Test container not running, we create it")
 
         exec_(
-            f"docker run -d --rm -p 5432:5432 --name qgepqwat -e POSTGRES_PASSWORD={pgconf['password'] or 'postgres'} -e POSTGRES_DB={pgconf['dbname'] or 'qgep_prod'} postgis/postgis"
+            f"docker run -d --rm -p 5432:5432 --name qgepqwat -e POSTGRES_PASSWORD={pgconf['password'] or 'postgres'} -e POSTGRES_DB={pgconf['dbname'] or 'qgep_prod'} postgis/postgis:13-3.2"
         )
 
     # Wait for PG