`Appearance.classNames` don't appear to make it to the DOM for email components.

[ZackDeRose]

Bug report

Describe the bug

Appearance.classNames don't appear to make it to the DOM for email components.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Create Auth component:

<Auth
    supabaseClient={supaClient}
    appearance={{ theme: ThemeSupa, className: { input: "foo" }}
/>

2. Inspect DOM [note no 'foo' class on input as expected]

Expected behavior

In the example about, should see the foo class on the input elements.

Screenshots

If applicable, add screenshots to help explain your problem.

System information

• OS: all
• Browser Chrome (expect all)
• Version of supabase-js: ^2
• Version of Node.js: 16

Additional context

Please assign me if this should be fixed. I was able to trace most of this already