Default to excluding pandas index

Author: kylebarron

lonboard/geoarrow/geopandas_interop.py

@@ -10,7 +10,7 @@
 def geopandas_to_geoarrow(
     gdf: gpd.GeoDataFrame,
     columns: Optional[List[str]] = None,
-    preserve_index: Optional[bool] = None,
+    preserve_index: Optional[bool] = False,
 ):
     df_attr = gdf.drop(columns=[gdf._geometry_column_name])