Update postgres versions (12.0 -> 12.1, etc)

roles/matrix-postgres/defaults/main.yml

@@ -8,10 +8,10 @@ matrix_postgres_db_name: ""
 matrix_postgres_base_path: "{{ matrix_base_data_path }}/postgres"
 matrix_postgres_data_path: "{{ matrix_postgres_base_path }}/data"
 
-matrix_postgres_docker_image_v9: "postgres:9.6.15-alpine"
-matrix_postgres_docker_image_v10: "postgres:10.10-alpine"
-matrix_postgres_docker_image_v11: "postgres:11.5-alpine"
-matrix_postgres_docker_image_v12: "postgres:12.0-alpine"
+matrix_postgres_docker_image_v9: "postgres:9.6.16-alpine"
+matrix_postgres_docker_image_v10: "postgres:10.11-alpine"
+matrix_postgres_docker_image_v11: "postgres:11.6-alpine"
+matrix_postgres_docker_image_v12: "postgres:12.1-alpine"
 matrix_postgres_docker_image_latest: "{{ matrix_postgres_docker_image_v12 }}"
 
 # This variable is assigned at runtime. Overriding its value has no effect.