fix: Fix HeatmapLayer by bumping deck.gl to 9.2 (#910)

Working again! 
<img width="808" height="557" alt="image"
src="https://github.com/user-attachments/assets/11f917ac-9c5b-4801-9d4a-77eef56601c3"
/>

Thanks @felixpalmer!

Closes #646

Author: kylebarron

lonboard/_layer.py

@@ -13,8 +13,6 @@
 
 from __future__ import annotations
 
-import warnings
-from textwrap import dedent
 from typing import TYPE_CHECKING, Any
 
 import ipywidgets
@@ -2030,21 +2028,9 @@ def __init__(
         table: ArrowStreamExportable,
         **kwargs: Unpack[HeatmapLayerKwargs],
     ) -> None:
-        err_msg = """
-        The `HeatmapLayer` is not currently working.
-
-        As of Lonboard v0.10, Lonboard upgraded to version 9.0 of the underlying
-        [deck.gl](https://deck.gl/) library. deck.gl [appears to have a
-        bug](https://github.com/visgl/deck.gl/issues/8960#issuecomment-2284791644) with
-        the HeatmapLayer in 9.0, that has not yet been fixed.
-
-        Please temporarily downgrade to Lonboard v0.9 if you would like to use the
-        `HeatmapLayer`.
-        """
-        warnings.warn(dedent(err_msg), UserWarning)
-
         # NOTE: we override the default for _rows_per_chunk because otherwise we render
-        # one heatmap per _chunk_ not for the entire dataset.
+        # one heatmap per _chunk_ not for the entire dataset (we don't have a way to
+        # concat batches in the frontend)
         table_o3 = Table.from_arrow(table)
         super().__init__(table=table, _rows_per_chunk=len(table_o3), **kwargs)