Reverts 0ec05da0eea03849fc72bed84a2c7fe7be1de1b6 to bring back #14444 to fix #14348 (again)
Merge pull request #14673 from twbs/restore_sr_friendly_collapse

More screenreader friendly Collapse, Take 2
fix typo in Tools section of Getting Started docs
Tooltip: Rely on `getBoundingClientRect` for `width` and `height`

Fixes #14553.
Merge pull request #14599 from twbs/tooltip-outerDims-only-when-body

Tooltip: Rely on `getBoundingClientRect` for `width` and `height`
grunt
Use container instead of parent for tooltip/popover auto-placement calcs

Fixes #14561. Big thanks to @wickstargazer.

[skip validator]
Merge pull request #14623 from twbs/fix-14561

Use container instead of parent for tooltip/popover auto-placement calcs
tooltip.js: fix alignment
Update dependencies.

Close #14664.
rm redundant grid column classes from responsive utilities demos
grunt
Add type to buttons in tooltip-viewport example
Fix anchor link
Merge pull request #14691 from Quy/master

Fix anchor link
Fixes #14687: Include video element in responsive embed
Fixes #14682: Remove quotes reset on blockquote elements as it causes rendering bugs
grunt