Pass Output type to Submission in onSubmit

[rphlmr]

Hello,

I apply this patch on my projects and i think it can be useful.

Make context.submission aware of the Output type.

Now we should be able to have intellisense with onSubmit context param.

Ex:

onSubmit(event, context) {
   // it has type
    if (context.submission.value?.step === "send-otp") {
        // do something
    }
},

[edmundhung]

Hi @rphlmr, thanks for the PR. I would love to improve the types here but your change is not accurate because there would be default submission object returned even when you didn't provide an onValidate handler.

To fix it, we might need to introduce an additional generic to capture the submission returned by the onValidate handler or some other adjustment on this behaviour.

[edmundhung]

This should be fixed on v1 as it will not returns a default submission anymore. Thanks!