Fix selenium startup on Windows
Fix selenium startup on Windows

Seems like selenium outputs to stderr on windows. This might also have
been a recent change because of an update though.

Since we check for a specific line and can safely assume that selenium
won't output this line to stderr AND stdout we don't have to check if
the event was already emitted.

robertknight/jsdom,szarouski/jsdom,danieljoppi/jsdom,zaucy/jsdom,sebmck/jsdom,jeffcarp/jsdom,AshCoolman/jsdom,danieljoppi/jsdom,cpojer/jsdom,AVGP/jsdom,zaucy/jsdom,mzgol/jsdom,nicolashenry/jsdom,Ye-Yong-Chi/jsdom,vestineo/jsdom,sirbrillig/jsdom,Sebmaster/jsdom,darobin/jsdom,Ye-Yong-Chi/jsdom,kittens/jsdom,cpojer/jsdom,robertknight/jsdom,evanlucas/jsdom,Sebmaster/jsdom,kesla/jsdom,tmpvar/jsdom,fiftin/jsdom,janusnic/jsdom,mzgol/jsdom,beni55/jsdom,kesla/jsdom,jeffcarp/jsdom,Zirro/jsdom,vestineo/jsdom,beni55/jsdom,sirbrillig/jsdom,crealogix/jsdom,aduyng/jsdom,aduyng/jsdom,susaing/jsdom,kesla/jsdom,mbostock/jsdom,sebmck/jsdom,fiftin/jsdom,medikoo/jsdom,crealogix/jsdom,snuggs/jsdom,mzgol/jsdom,fiftin/jsdom,susaing/jsdom,aduyng/jsdom,evanlucas/jsdom,darobin/jsdom,evdevgit/jsdom,szarouski/jsdom,nicolashenry/jsdom,evdevgit/jsdom,AshCoolman/jsdom,kevinold/jsdom,kevinold/jsdom,Joris-van-der-Wel/jsdom,janusnic/jsdom,danieljoppi/jsdom,kittens/jsdom,szarouski/jsdom,Sebmaster/jsdom,medikoo/jsdom,Zirro/jsdom,jeffcarp/jsdom,selam/jsdom,mbostock/jsdom,AVGP/jsdom,snuggs/jsdom,Joris-van-der-Wel/jsdom,beni55/jsdom,medikoo/jsdom,vestineo/jsdom,kittens/jsdom,sebmck/jsdom,darobin/jsdom,Ye-Yong-Chi/jsdom,lcstore/jsdom,Joris-van-der-Wel/jsdom,selam/jsdom,cpojer/jsdom,lcstore/jsdom,selam/jsdom,kevinold/jsdom,lcstore/jsdom,AshCoolman/jsdom,evdevgit/jsdom,evanlucas/jsdom,zaucy/jsdom,susaing/jsdom,nicolashenry/jsdom,sirbrillig/jsdom,tmpvar/jsdom,mbostock/jsdom,robertknight/jsdom,janusnic/jsdom