Adjust default.ts exports (#734)

packages/ui-shared/src/icons/beachball/defaults.ts

@@ -3,14 +3,9 @@
 
 // Copyright 2016 Dan Finlay
 
-const COLORS: string[] = [
+export const COLORS: readonly string[] = [
   // https://sashat.me/2017/01/11/list-of-20-simple-distinct-colors/
   '#ffe119', '#4363d8', '#f58231', '#fabebe', '#e6beff', '#800000', '#000075', '#a9a9a9', '#ffffff', '#000000'
-];
+] as const;
 
-const SHAPE_COUNT = 5;
-
-export {
-  COLORS,
-  SHAPE_COUNT
-};
+export const SHAPE_COUNT = 5 as const;