Update .travis.yml
Update .travis.yml

And changed dist to bionic so gcc version is 7.4.0
GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC,GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC,GOMC-WSU/GOMC