Input: 'focus' method does not exist in typings

[InExtremaRes]

Steps

This example was tested using create-react-app-typescript

import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { Input } from 'semantic-ui-react';

ReactDOM.render(
    <Input ref={(i) => { if (i) { i.focus(); } }} />,
    document.getElementById('root') as HTMLElement
);

Expected Result

It compiles and work.
The same example works with Babel using ES6 only (no TypeScript, as with create-react-app).

Actual Result

It fails to compile with error:

(6,37): error TS2339: Property 'focus' does not exist on type 'Component<InputProps, ComponentState>'.

Version

0.71.4
(React 15.6.1)

[InExtremaRes]

I do not test but it's very likely that focus method does not exist in others typings as well (as Button, for instance).

[layershifter]

@InExtremaRes Thanks for notice, TextArea has focus, too. I've updated PR.