[travis] Add `sudo: false` to speed up the build
[travis] Add `sudo: false` to speed up the build

malyshevalex/eventemitter3,malyshevalex/eventemitter3,pawsong/eventemitter3,marlun78/eventemitter3,naoufal/eventemitter3,primus/eventemitter3,pawsong/eventemitter3,primus/eventemitter3,primus/eventemitter3,naoufal/eventemitter3,marlun78/eventemitter3