add .sr-only-focusable; fixes #12259
update docs to include+use .sr-only-focusable
replace .visible-{size} with .visible-{size}-{display} ; fixes #8869
Add transition-timing-function mixin to docs
Do csscomb earlier in build phase
Reorganize docs assets
Merge pull request #12961 from BBosman/csscomb

Do csscomb earlier in build phase
Merge pull request #12505 from ZDroid/js-cs-hint

Reorganize docs assets
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