Merge branch 'feat/merge-datasets' of https://github.com/luxonis/luxo…

…nis-ml into feat/merge-datasets

luxonis_ml/data/datasets/luxonis_dataset.py

@@ -345,7 +345,7 @@ def merge_with(
         self,
         other: "LuxonisDataset",
         inplace: bool = True,
-        new_dataset_name: str = None,
+        new_dataset_name: Optional[str] = None,
     ) -> "LuxonisDataset":
         """Merge all data from `other` LuxonisDataset into the current
         dataset (in-place or in a new dataset).