message: update code exameple for RN
diff: @@ -3,7 +3,7 @@ import { Text, View, TextInput, Button, Alert } from "react-native"
  import useForm from 'react-hook-form'
  export default function App() {
  - const { register, setValue, handleSubmit} = useForm()
  + const { register, setValue, handleSubmit, errors } = useForm()
  const onSubmit = data => Alert.alert('Form Data', data)
  return (
  @@ -11,8 +11,9 @@ export default function App() {
  <Text>First name</Text>
  <TextInput
  ref={register({ name: 'firstName'}, { required: true })}
  - onChangeText={text => setValue('firstName', text)}
  + onChangeText={text => setValue('firstName', text, true)}
  />
  + {errors.firstName && <Text>This is required.</Text>}
  <Text>Last name</Text>
  <TextInput
  