Allow for deleting customer's email address in type defintions

[snoack]

You can delete a customer's email address via stripe.customers.update(id, {email: null}). However, this is currently causing a type error, since the type definitions don't allow the use of null here. But if you bypass the type check it works as expected. I wonder if other CustomerUpdateParams properties have the same issue?

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[richardm-stripe]

Hello @snoack, sorry for the delay on this.

You can pass the empty string '' in order to trigger the emptying of the email string (stripe-node represents null values as empty strings when sending them over the wire anyway because the Stripe API is form-encoded).

I investigated and apparently there's an issue with several fields of type string that would be better represented as Stripe.Emptyable<string> to allow passing null. Many of them were fixed in v12.17.0 but the particular field in your report is waiting on a little extra work to fix the definitions upstream.

Thank you for reporting and thanks for your patience!