- #1404 Adds a11y improvements
- corrects behavior of VictoryContainer so that it only adds aria-labelledby and aria-describedby attributes when there are actually title and / or desc elements that are rendered (controlled by the title and desc props on VictoryContainer
- adds a tabIndex prop to all primitive components that Victory renders (i.e. VictoryLabel, Bar etc). This prop may be given as a number or a function of other props
- adds a desc prop to all primitive components. This prop may be given as a number or a function of other props