1.13.0

Added

• driver.js/headless runs a tour without drawing anything, so you can render your own UI.
• scrollIntoView: false stops driver.js from scrolling to the highlighted element and popover.
• onWaitingForElement tells you when a step starts waiting for its element, and its signal when the wait ends.
• onElementReplaced tells you when the app re-renders the highlighted element and the step moves to the new one.