Form doesn't wait for pending validations before submitting.

I've found something that looks like a bug.

I don't think it should be possible to submit a form until validations have passed, however if validation is in progress a form still submits as if the validation had passed..

The following example is just like the Async validation example but with a longer delay inside the validator. Filling in the form with an invalid name and immediately submitting allows the form to be submitted with invalid content.

https://codesandbox.io/s/8n1n7zy1rj

I believe form submission should wait for validation to complete. Furthermore ensuring appropriate timeouts so that a form isn't locked by a never ending validation should be the concern of the validation function.