fix ts strict issue (#84)

Author: kylebarron

src/picking.ts

@@ -21,6 +21,9 @@ export function getPickingInfo(
   const recordBatchIdx: number = sourceLayer.props.recordBatchIdx;
   const batch = table.batches[recordBatchIdx];
   const row = batch.get(index);
+  if (row === null) {
+    return info;
+  }
 
   // @ts-expect-error hack: using private method to avoid recomputing via
   // batch lengths on each iteration

src/text-layer.ts

@@ -131,6 +131,7 @@ const ourDefaultProps: Pick<
   _validate: true,
 };
 
+// @ts-expect-error Type error in merging default props with ours
 const defaultProps: DefaultProps<GeoArrowTextLayerProps> = {
   ..._defaultProps,
   ...ourDefaultProps,

src/types.ts

@@ -2,7 +2,7 @@ import type { Accessor, Color, PickingInfo } from "@deck.gl/core/typed";
 import * as arrow from "apache-arrow";
 
 export type GeoArrowPickingInfo = PickingInfo & {
-  object: arrow.StructRowProxy;
+  object?: arrow.StructRowProxy;
 };
 
 export type FloatAccessor =