init and destroy need to always return $el
init and destroy need to always return $el

The init and destroy methods need to always return $el, even if they do nothing because feature detection says sticky positioning is natively supported, otherwise code using them for chaining would break.
Xephi/fixed-sticky,nrcmedia/fixed-sticky,niksy/fixed-sticky,nrcmedia/fixed-sticky,filamentgroup/fixed-sticky,filamentgroup/fixed-sticky,Xephi/fixed-sticky,niksy/fixed-sticky