.travis.yml: drop node 0.4
.travis.yml: drop node 0.4

node-xmpp/node-expat,noahjs/node-expat,Moharu/node-expat,Moharu/node-expat,noahjs/node-expat,node-xmpp/node-expat,noahjs/node-expat,julianduque/node-expat,node-xmpp/node-expat,julianduque/node-expat,julianduque/node-expat,Moharu/node-expat