Bump NPM version to 0.4.3 in preparation for publishing.
Bump NPM version to 0.4.3 in preparation for publishing.

kittens/regenerator,facebook/regenerator,Jericho25/regenerator,facebook/regenerator,juliocanares/regenerator,Jericho25/regenerator,rafaelstz/regenerator,rafaelstz/regenerator,sebmck/regenerator,kittens/regenerator,liviuignat/regenerator,RReverser/js-goto-transpiler,liviuignat/regenerator,facebook/regenerator,juliocanares/regenerator,sebmck/regenerator,RReverser/js-goto-transpiler