To bind options with the synchronous $ API, one must do:

$(options).sync`command`

However, users are likely to do the following instead:

$.sync(options)`command`

We could fix this either:

• By supporting that second syntax.
• By making it fail with a better error message.

This PR implements the second solution. However, I am happy to implement the first solution if you'd prefer it instead, just let me know!