chore(package): update lockfile
chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

RobotlegsJS/RobotlegsJS-Pixi,RobotlegsJS/RobotlegsJS-Pixi,RobotlegsJS/RobotlegsJS-Pixi,RobotlegsJS/RobotlegsJS-Pixi