fix: redirect URL option for resend of confirmation emails

[mtte]

What kind of change does this PR introduce?

Bug fix: add option to specify the redirect URL when using supabase.auth.resend().

What is the current behavior?

Was currently not possible, related issue: #718

What is the new behavior?

It is now possible to specify the redirect URL:

supabase.auth.resend({
  type: 'signup',
  email: '<email>',
  options: {
    redirectTo: '<URL>',
  }
});

Additional context

The backend (GoTrue) already supported specifying the redirect URL for the link in the signup/change_email mail.

[kangmingtay]

fixed in #724 - thanks for reporting this issue though!