Use PhantomJS for testing on Travis.
Use PhantomJS for testing on Travis.

IvyApp/ivy-codemirror,IvyApp/ivy-codemirror,HeroicEric/ivy-codemirror,mshafir/ivy-codemirror,mshafir/ivy-codemirror,mshafir/ivy-codemirror,HeroicEric/ivy-codemirror,HeroicEric/ivy-codemirror