fix: `FormValue` should never be `null`

[aaronadamsCA]

It looks like I made a mistake in #508 when I widened FormValue to include null in some cases. I'm reasonably confident a field's initialValue will never be null.

I noticed this when I created a component that takes name: FieldName<string | object>. You can see the strange behaviour here:

TypeScript Playground

You can see what happened when I ran git blame here:


Since this is a one-line change, I'm just submitting it through the GitHub UI to confirm the tests will pass.

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🦋 Changeset detected

Latest commit: 7aae87a07567384f1b7d05ecadd2135f8f2f0d97

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

| Name | Type | | ----------------- | ----- | | @conform-to/dom | Patch | | @conform-to/react | Patch | | @conform-to/yup | Patch | | @conform-to/zod | Patch |

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