bump grunt-saucelabs to v5.1.3
Merge pull request #13594 from twbs/bump-saucelabs

bump grunt-saucelabs to v5.1.3
Adds tooltip self-ref; addresses #12320 #12342

To fix #12320, add a data reference on the tooltip (and popover) such
that calling $(‘#myTooltip’).tooltip(‘hide’) will hide the visible tip.
reverts css changes

must have been an unrelated build change.