Added a new task which collects PostgreSQL version

postgresql/tasks/db_info.yml

+---
+
+- name: Collect PostgreSQL version
+  become: yes
+  become_user: postgres
+  postgresql_info:
+    filter: ver*
+  register: postgresql_version
+
+- name: Print PostgreSQL version
+  debug:
+    var: postgresql_version.version.major
+
+...