Add revalidateMode prop to Form

[johnsonthedev]

this is regarding: https://remix-forms.seasoned.cc/examples/actions/field-error

If I enter foo@bar.com and submit the form it returns with Email already taken. => Ok
If I change the email to foo the error changes to Invalid email without requiring a submit => not sure if this is a bug or a feature. I think it should only re-validate if I use mode="onChange"
If I now change the email to a valid one like remix@foo.com the old/cached error appears: Email already taken => Not Ok. I think this is confusing, as it might lead to the assumption that remix@foo.com is taken too.

My proposal would be to allow resetting errors

[danielweinmann]

Thanks @johnsonthedev! My suggestion for this issue is:

1. Add a revalidateMode prop to Form and pass it to react-hook-form's useForm. Right now, we're always using the onChange default for revalidation.

2. Reset server-side errors upon revalidation.

How does that sound to you?

We'll work on this soon, but it probably won't be a top priority. Feel free to send a PR in the meantime :) thank you!

[danielweinmann]

We'll track the server-side revalidation on #111 and use this issue only for adding the revalidateMode to Form.

[danielweinmann]

Released on v1.3.0. Thanks, @felipefreitag 🎉