message: include rules for custom register
diff: @@ -506,7 +506,7 @@ const { onChange } = register('lastChange'); // this onChange method can update
  // register's onChange got overwrite by register method
  <input {...register('test')} onChange={handleChange}/>
  -const firstName = register('firstName')
  +const firstName = register('firstName', { required: true })
  <input
  onChange={(e) => {
  firstName.onChange(e); // method from hook form register
  @@ -531,7 +531,7 @@ const firstName = register('firstName')
  rawData={`// not working, because ref is not assigned
  <TextInput {...register('test')} />
  -const firstName = register('firstName')
  +const firstName = register('firstName', { required: true })
  <TextInput
  onChange={firstName.onChange}
  onBlur={firstName.onBlur}
  