Makes mypy happy

Add typing to make mypy check pass

src/pubtools/_marketplacesvm/tasks/push/command.py

@@ -208,7 +208,7 @@ def _push_upload(
             # multiple destinations within each marketplace, we may merge the StArMap "meta"
             # safely as the upload will just take advantage of their "sharing_accounts"
             # which es expected to be the same for all destinations within a same marketplace.
-            meta = {}
+            meta: Dict[str, Any] = {}
             for d in pi.dest:
                 meta.update(mapped_item.get_metadata_for_mapped_item(d) or {})
             pi = self._upload(