travis: remove nodejs 0.9
travis: remove nodejs 0.9

co3k/HTMLHint,yaniswang/HTMLHint,doshprompt/HTMLHint,rziv/HTMLFormHint,wi2kl3r/HTMLHint,rziv/HTMLFormHint,EllieAdam/HTMLHint,EllieAdam/HTMLHint,wi2kl3r/HTMLHint,co3k/HTMLHint,yaniswang/HTMLHint,doshprompt/HTMLHint