Take meta attrs from dictionary result

Author: cpsievert

htmltools/_core.py

@@ -1512,7 +1512,7 @@ def as_html_tags(
         Render the dependency as a ``TagList()``.
         """
         d = self.as_dict(lib_prefix=lib_prefix, include_version=include_version)
-        metas = [Tag("meta", **m) for m in self.meta]  # type: ignore
+        metas = [Tag("meta", **m) for m in d["meta"]]
         links = [Tag("link", **s) for s in d["stylesheet"]]
         scripts = [Tag("script", **s) for s in d["script"]]
         return TagList(*metas, *links, *scripts, self.head)