Fix postgresql_user priv argument deprecation

Fix this warning:
```
[DEPRECATION WARNING]: Param 'priv' is deprecated. See the module docs
for more information. This feature will be removed from
community.postgreql in version 3.0.0.
```

See:
ansible-collections/community.postgresql#212
ansible-collections/community.postgresql#227
ansible-collections/community.postgresql#493

Author: Jamal-B

README.md

@@ -127,10 +127,12 @@ postgresql_database_schemas:
 
 # List of user privileges to be applied (optional)
 postgresql_user_privileges:
-  - name: baz                   # user name
-    db: foobar                  # database
-    priv: "ALL"                 # privilege string format: example: INSERT,UPDATE/table:SELECT/anothertable:ALL
-    role_attr_flags: "CREATEDB" # role attribute flags
+  - roles: baz                  # comma separated list of role (user/group) names to set permissions for.
+    database: foobar            # name of database to connect to.
+    schema: acme_baz            # schema that contains the database objects specified via objs (see documentation for details).
+    type: table                 # type of database object to set privileges on. e.g.: table (default), sequence, function,... (see documentation for details)
+    objs: employee              # comma separated list of database objects to set privileges on (see documentation for details).
+    privs: "ALL"                # comma separated list of privileges to grant. e.g.: INSERT,UPDATE/ALL/USAGE
 ```
 
 There's a lot more knobs and bolts to set, which you can find in the [defaults/main.yml](./defaults/main.yml)

tasks/users_privileges.yml

@@ -1,12 +1,15 @@
 # file: postgresql/tasks/users_privileges.yml
 
 - name: PostgreSQL | Update the user privileges
-  postgresql_user:
-    name: "{{item.name}}"
-    db: "{{item.db | default(omit)}}"
-    port: "{{postgresql_port}}"
-    priv: "{{item.priv | default(omit)}}"
+  postgresql_privs:
+    roles: "{{item.roles}}"
+    database: "{{item.database | default(omit)}}"
+    schema: "{{item.schema | default(omit)}}"
+    type: "{{item.type | default(omit)}}"
+    objs: "{{item.objs | default(omit)}}"
+    privs: "{{item.privs | default(omit)}}"
     state: present
+    port: "{{postgresql_port}}"
     login_host: "{{item.host | default(omit)}}"
     login_user: "{{postgresql_admin_user}}"
     role_attr_flags: "{{item.role_attr_flags | default(omit)}}"

tests/docker/group_vars/postgresql.yml

@@ -35,8 +35,8 @@ postgresql_database_schemas:
     owner: baz
 
 postgresql_user_privileges:
-  - name: baz
-    db: foobar
+  - roles: baz
+    database: foobar
 
 postgresql_ext_install_contrib: true
 

tests/vars.yml

@@ -32,8 +32,8 @@ postgresql_users:
   - name: zabaz
 
 postgresql_user_privileges:
-  - name: baz
-    db: foobar
+  - roles: baz
+    database: foobar
 
 postgresql_database_schemas:
   - database: foobar