clearValue
Clear a <textarea> or text <input> element’s value. Make sure you can interact with the
element before using this command. You can't clear an input element that is disabled or in
readonly mode.
Usage
$(selector).clearValue()
Example
it('should demonstrate the clearValue command', function () {
    const elem = $('.input')
    elem.setValue('test123')
    const value = elem.getValue()
    console.log(value) // returns 'test123'
    elem.clearValue()
    value = elem.getValue()
    assert(value === ''); // true
})