Changes the tabs element's current tab.
The changeTab() function returns a Promise that is resolved when
the tabs element finishes moving from the current tab to the tab
referred to by tabReference.
You can retrieve tab elements to pass to the
tabReference parameter from your tabs element using the
currentTab, defaultTab, or tabs properties.
Changing tabs using changeTab() triggers the onChange() event handler.
The tab within the tabs element to move to. Either a tab element or its ID without a preceding # character.