Update repository links in package.json.
Update repository links in package.json.

facebook/regenerator,jlongster/transmogrifier,rafaelstz/regenerator,kittens/regenerator,sebmck/regenerator,facebook/regenerator,rwaldron/regenerator,sebmck/regenerator,Jericho25/regenerator,liviuignat/regenerator,liviuignat/regenerator,juliocanares/regenerator,juliocanares/regenerator,Jericho25/regenerator,jlongster/unwinder,jlongster/transmogrifier,RReverser/js-goto-transpiler,facebook/regenerator,kittens/regenerator,rafaelstz/regenerator,RReverser/js-goto-transpiler,jlongster/unwinder,jlongster/unwinder