chore: update charm libraries (#62)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

lib/charms/data_platform_libs/v0/data_interfaces.py

@@ -320,7 +320,7 @@ def _on_topic_requested(self, event: TopicRequestedEvent):
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 19
+LIBPATCH = 20
 
 PYDEPS = ["ops>=2.0.0"]
 
@@ -1674,6 +1674,10 @@ def _assign_relation_alias(self, relation_id: int) -> None:
         if relation:
             relation.data[self.local_unit].update({"alias": available_aliases[0]})
 
+        # We need to set relation alias also on the application level so,
+        # it will be accessible in show-unit juju command, executed for a consumer application unit
+        self.update_relation_data(relation_id, {"alias": available_aliases[0]})
+
     def _emit_aliased_event(self, event: RelationChangedEvent, event_name: str) -> None:
         """Emit an aliased event to a particular relation if it has an alias.