add .sr-only-focusable; fixes #12259
update docs to include+use .sr-only-focusable
Add transition-timing-function mixin to docs
Move license to the top of the file.
Improve badges mixinability
rm #1969 from browser bugs list per outcome of investigation
Remove ./ from package.json paths
Remove ./ from _config.yml paths
Merge pull request #12971 from ZDroid/config-yml

Remove ./ from _config.yml paths
Merge pull request #12970 from ZDroid/package.json-pa

Remove ./ from package.json paths
Merge pull request #12969 from ZDroid/badge-mixin

Improve badges mixinability
Merge pull request #12962 from BBosman/transitions-count

Add transition-timing-function mixin to docs
fix #12959
S H R I N K W R A P
Merge pull request #12972 from twbs/cleaner-shrinkwrap

Exclude `resolved` from npm shrinkwrap to avoid irrelevant changes
Update .hide-text() comment
Remove redundant _config.yml quotes
Merge pull request #12980 from ZDroid/config-yml-quotes

Remove redundant _config.yml quotes
grunt
Fixes #12966: Ensure icon font vars are loaded into Customizer