Cannot set "title" property

Slider component does not respect "title" property. I can set "className" property and it will be assigned to the top level <div /> element of component. However I cannot set "title" property in that way: it just does not appear in DOM tree after setting it to the Slider.

Example code:

import Slider  from 'rc-slider';

...

<Slider
    id="test-value"
    min={0}
    max={1}
    title={"test title"} // this will not be set
    className={"pc-range-slider test-class-name"}
    value={this.props.value}
    step={0.1}
    onChange={(value) => this.handleAttributeChange('prop', value, true)}
/>

Start at the Slider component entry point and inspect how className and other properties are applied to the top-level div. Reproduce the example and verify that the title property appears in the rendered DOM without changing the existing className behavior.