fix(CI): update travis script to include mongodb
fix(CI): update travis script to include mongodb

eantler/google,acguanacaste/liomysSalvini,carloscuatin/mern-starter,Muisti/muisti,zivkaziv/MazorTech,caleb272/PollIt,GTDev87/stylizer,cdriscol/amerikawedding2017,mygithub1216/MERN_SelfCar_Dashboard,denistakeda/botboard,OmarBERRABEH/dahakni,leranf/hotwireCarRentalSearch,Hashnode/mern-starter,maicongil/fcc_voting_app,denistakeda/evolution,Trulsabe/reactLinuxMern,b3j0f/lechangement,Skrpk/mern-sagas,sharvit/my-blog-react,thanhdatvo/tuoihoctro.react,michaelkirschbaum/ender-site,Skrpk/mern-sagas,eantler/simmeme-client,Investnaira/in,acguanacaste/liomysSalvini,mygithub1216/MERN_SelfCar_Dashboard,eantler/simmeme-client,realsoftdev/knack,GTDev87/stylizer,jessicarobins/det,carloscuatin/mern-starter,Muisti/muisti,thanhdatvo/tuoihoctro.react,zivkaziv/MazorTech,bbviana/alexandria-mern,CODEINAE/todoy,sharvit/my-blog-react,realsoftdev/knack,denistakeda/evolution,zivkaziv/MazorTech,bbviana/alexandria-mern,caleb272/PollIt,Trulsabe/reactLinuxMern,michaelkirschbaum/ender-site,Hashnode/mern-starter,Investnaira/in,Cathje/KLP,denistakeda/botboard,yagneshmodh/QuizeApp,russjwells/sittingweb,russjwells/sittingweb,maicongil/fcc_voting_app,jessicarobins/det,eantler/google,ArthurGerbelot/keystamp-mern,leranf/hotwireCarRentalSearch,ArthurGerbelot/keystamp-mern,yagneshmodh/QuizeApp,b3j0f/lechangement,Cathje/KLP,OmarBERRABEH/dahakni,CODEINAE/todoy