Squashed 'libs/sticky-list-headers/' changes from fb2b52a..0dc6d1c

0dc6d1c Merge branch 'master' of github.com:semantic-web-library/sticky-list-headers
ad5074d browsers that are not supporting nth-of-type query selector
6294339 browsers that are not supporting nth-of-type query selector

git-subtree-dir: libs/sticky-list-headers
git-subtree-split: 0dc6d1c0f5cb1496a8f12834d792c891b247cda4
Merge commit '426a653665a1bf5bd69f78f0372dffbc1a820113'