Automatically use the latest version of PostgreSQL (#6851)

.ci/compose.ci.yaml

@@ -18,7 +18,7 @@ services:
     image: redis:7-alpine
     restart: unless-stopped
   postgres:
-    image: pgautoupgrade/pgautoupgrade:15-alpine3.8
+    image: pgautoupgrade/pgautoupgrade:latest
     command: "postgres -c fsync=off -c full_page_writes=off -c synchronous_commit=OFF"
     restart: unless-stopped
     environment:

.ci/compose.cypress.yaml

@@ -66,7 +66,7 @@ services:
     image: redis:7-alpine
     restart: unless-stopped
   postgres:
-    image: pgautoupgrade/pgautoupgrade:15-alpine3.8
+    image: pgautoupgrade/pgautoupgrade:latest
     command: "postgres -c fsync=off -c full_page_writes=off -c synchronous_commit=OFF"
     restart: unless-stopped
     environment:

compose.yaml

@@ -52,7 +52,7 @@ services:
     image: redis:7-alpine
     restart: unless-stopped
   postgres:
-    image: pgautoupgrade/pgautoupgrade:15-alpine3.8
+    image: pgautoupgrade/pgautoupgrade:latest
     ports:
       - "15432:5432"
     # The following turns the DB into less durable, but gains significant performance improvements for the tests run (x3