followup to issue #1015 (#1112)

Author: ktabors

packages/@react-spectrum/picker/stories/Picker.stories.tsx

@@ -283,6 +283,17 @@ storiesOf('Picker', module)
       </Picker>
     )
   )
+  .add(
+    'falsy item key',
+    () => (
+      <Picker label="Test" onSelectionChange={action('selectionChange')}>
+        <Item key="">None</Item>
+        <Item key="One">One</Item>
+        <Item key="Two">Two</Item>
+        <Item key="Three">Three</Item>
+      </Picker>
+    )
+  )
   .add(
     'no visible label',
     () => (