Add tree-sitter to the list of allowed external packages (#138)

Author: sobolevn

stub_uploader/metadata.py

@@ -221,6 +221,7 @@ def verify_typeshed_req(req: Requirement) -> None:
     "pandas-stubs",
     "referencing",
     "torch",
+    "tree-sitter",
     "urllib3",
 }