BottomSheet returns an error after closing

[anastasialanz]

To recreate:

• Go to https://cauldron.dequelabs.com/components/BottomSheet
• Toggle the BottomSheet component
• Click on the "x" button in the top right
• See the error in the console index.js:829 Uncaught TypeError: d.current.contains is not a function

Running the docs locally, you will see this error:
index.js:827 Uncaught TypeError: childElementRef.current.contains is not a function which occurs within the ClickOutsideListener function