Select Postgres service to work with particular client version.

.drone.yml

@@ -4,7 +4,7 @@ name: python-3-5-alpine-3-10
 
 services:
   - name: postgresql
-    image: postgres:11.5
+    image: postgres:11.6-alpine
     environment:
       POSTGRES_PASSWORD: test
       POSTGRES_DB: test
@@ -21,7 +21,7 @@ name: python-3-6-alpine-3-10
 
 services:
   - name: postgresql
-    image: postgres:11.5
+    image: postgres:11.6-alpine
     environment:
       POSTGRES_PASSWORD: test
       POSTGRES_DB: test
@@ -38,7 +38,7 @@ name: python-3-7-alpine-3-10
 
 services:
   - name: postgresql
-    image: postgres:11.5
+    image: postgres:11.6-alpine
     environment:
       POSTGRES_PASSWORD: test
       POSTGRES_DB: test
@@ -55,7 +55,7 @@ name: python-3-7-alpine-3-7
 
 services:
   - name: postgresql
-    image: postgres:11.5
+    image: postgres:10.11-alpine
     environment:
       POSTGRES_PASSWORD: test
       POSTGRES_DB: test
@@ -72,7 +72,7 @@ name: python-3-8-alpine-3-10
 
 services:
   - name: postgresql
-    image: postgres:11.5
+    image: postgres:11.6-alpine
     environment:
       POSTGRES_PASSWORD: test
       POSTGRES_DB: test