Tab: data.activeIndex is overwritten in onTabChange for controlled Tab

[JamiesWhiteShirt]

Steps

Make a controlled Tab with both activeIndex and onTabChange props.
Click an item in the tab menu.
Read the data.activeIndex value in onTabChange.

Expected Result

data.activeIndex should be the index of the tab that was clicked.

Actual Result

data.activeIndex is the value of the activeIndex prop passed to the Tab component.

Version

0.71.1

Testcase

https://codepen.io/anon/pen/QMLydJ

[levithomason]

Superb report, thanks much. PR up.

[JamiesWhiteShirt]

Superb handling, thanks for the quick fix.