v2.0.0

1. objectify() has been renamed to serializeOptions()
2. The deprecated submit component has been removed
3. Props for the Textarea input component have changed:
   • maxLength now defaults to false. Provide a number to implement a maximum number of characters.
   • showCharacterCount has been renamed to hideCharacterCount
   • hideCharacterCount defaults to false (to match the default absence of maxLength).
     Pass down true to hide the character count if you've provided a maxLength but do not want it shown.