travis: don't test node v0.6
travis: don't test node v0.6

"readable-stream" doesn't even work there

EQ4/node-lame,TooTallNate/node-lame,PlayNetwork/node-lame,mcanthony/node-lame,TooTallNate/node-lame,dag10/node-lame,PlayNetwork/node-lame,EQ4/node-lame,PlayNetwork/node-lame,EQ4/node-lame,mcanthony/node-lame,dag10/node-lame,dag10/node-lame,mcanthony/node-lame,TooTallNate/node-lame