harmonize docker-compose and ci.yml PG versions to prod

Author: ewdurbin

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: postgres:10.1
+        image: postgres:15.3
         env:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres

docker-compose.yml

@@ -2,7 +2,7 @@ version: "3.9"
 
 services:
   postgres:
-    image: postgres:12-bullseye  # required for 4.2 upgrades
+    image: postgres:15.3-bullseye
     ports:
       - "5433:5432"
     environment: