Wrap .pagination & .pager in <nav> to improve accessibility
Remove unused Tooltip#validate method
Must explicitly destroy tooltip in SVG unit test since its container is body.

Leaking tooltips across tests leads to confusion and sadness.
Merge pull request #14625 from twbs/svg-tooltip-test-fix

Must explicitly destroy tooltip in SVG unit test since its container is body
grunt
Merge pull request #14610 from twbs/axe-tooltip-validate

Remove unused Tooltip#validate method
grunt
Merge pull request #14577 from twbs/pagination-role-nav

Wrap .pagination & .pager in <nav> to improve accessibility