Adjust package lists per Debian version

roles/pvc/tasks/patroni/main.yml

@@ -1,13 +1,25 @@
 ---
-- name: install patroni packages via apt
-  apt:
-    name:
+- set_fact:
+    package_list:
       - python3-psycopg2
-      - python-psycopg2
       - python3-kazoo
+      - python-psycopg2
       - python-kazoo
       - patroni
       - postgresql-11
+  when: debian_version|int <= 10
+      
+- set_fact:
+    package_list:
+      - python3-psycopg2
+      - python3-kazoo
+      - patroni
+      - postgresql-11
+  when: debian_version|int >= 11
+      
+- name: install patroni packages via apt
+  apt:
+    name: "{{ package_list }}"
     state: latest
     update-cache: yes