add Ubuntu 20.04 support

tasks/Debian/config.yaml

@@ -1,4 +1,11 @@
 ---
+- name: Create data directory
+  file:
+    path: "{{ postgresql_data_dir }}"
+    owner: "postgres"
+    group: "postgres"
+    state: directory
+
 - name: Merge user options for PostgreSQL config
   set_fact:
     postgresql_combined_parameters: "{{ postgresql_default_parameters | combine(postgresql_custom_parameters|default({}), recursive=true) }}"