changed year of release for 2.0
changed year of release for 2.0

romainneutron/Silex,mTorres/Silex,mTorres/Silex,romainneutron/Silex,romainneutron/Silex,silexphp/Silex,gencer/Silex,fabpot/Silex,fabpot/Silex