Fix mypy

Author: VeckoTheGecko

parcels/tools/exampledata_utils.py

@@ -101,7 +101,7 @@ def _create_pooch_registry() -> dict[str, None]:
 
     Hashes are set to None for all files.
     """
-    registry = {}
+    registry: dict[str, None] = {}
     for dataset, filenames in EXAMPLE_DATA_FILES.items():
         for filename in filenames:
             registry[f"{dataset}/{filename}"] = None

pyproject.toml

@@ -222,5 +222,6 @@ module = [
     "cftime",
     "pykdtree.kdtree",
     "netCDF4",
+    "pooch",
 ]
 ignore_missing_imports = true