Change GeoJSON class parameter type to dict[str, Any]

Author: p-vdp

stubs/geojson/geojson/base.pyi

@@ -1,4 +1,6 @@
-class GeoJSON(dict):
+from typing import Any
+
+class GeoJSON(dict[str, Any]):
     def __init__(self, iterable=(), **extra) -> None: ...
     def __getattr__(self, name): ...
     def __setattr__(self, name, value) -> None: ...