Add missing packages

DESCRIPTION

@@ -39,6 +39,7 @@ Imports:
     tools,
     utils
 Suggests:
+    arrow,
     connectapi,
     covr,
     dm,
@@ -59,7 +60,8 @@ Suggests:
     roxygen2,
     tinytest,
     V8,
-    webmap
+    webmap,
+    writexl
 License: CC0
 Copyright: This software is in the public domain because it contains materials
     that originally came from the United States Geological Survey (USGS), an