RouteAction returns undefined in case of error

[frenzzy]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• infrastructure changes
• TypeScript typings

What is the current behavior?

In case of error createServerAction$ returns undefined as a result, but typings don't:

import { FormError } from 'solid-start'
import { createServerAction$ } from 'solid-start/server'

export default function Page() {
  const [action, submit] = createServerAction$(async (formData: FormData) => {
    if (formData.get('hasError')) {
      throw new FormError('Validation failed')
    }
    return 'demo'
  })
  return (
    <submit.Form
      onsubmit={async (event) => {
        event.preventDefault()
        const formData = new FormData(event.currentTarget)
        const result = await submit(formData)
        console.log(action.result === result) // true
        console.log(action.result) // type: string | undefined
        /* ACTUAL:   */ console.log(result) // type: string
        /* EXPECTED: */ console.log(result) // type: string | undefined
      }}
    >
      <input type="checkbox" name="hasError" value="yes" />
      <input type="submit"/>
    </submit.Form>
  )
}

What is the new behavior?

Typings reflect the actual behavior

Other information

[ryansolid]

Thanks