Update .travis.yml
Update .travis.yml

Force install of mono
icodingforfood/SteamBot,BuzzyOG/CSGOWinBig-SteamBot,ChalkyBrush/SteamBots,MadBender/SteamBot,Murzyneczka/CSGOWinBig-SteamBot,nuller1joe/SteamBot,Banana23/Tryout,fjch1997/SteamBot,zigagrcar/SteamTradeOffersBot,stackia/SteamBot,niachris/SteamBotNew,ztizzlegaming/CSGOWinBig-SteamBot,Wendt9222/SteamBot-1,terryhau/SteamBot,martingabriel/SteamBot,Alex-Nabu/CSGOWinBig-SteamBot,TheRod1990/SteamBot,stackia/SteamBot,martingabriel/SteamBot,Moondarker/CSGOWinBig-SteamBot,JackHarknes/Bot1,MattrAus/SteamBot,tarun200897/SteamBot,Schwehn42/SteamBot,GoeGaming/SteamBot,stigping/SteamBot,trervorx/SteamBot,Moondarker/CSGOWinBig-SteamBot,Bottswana/SteamBot,avoak/SteamBot,BlueRaja/SteamBot,JackHarknes/Bot1,nuller1joe/SteamBot,MadBender/SteamBot,23RDGit/CSGOWinBig-SteamBot,MattrAus/SteamBot,wowzone/gamerpro,wowzone/gamerpro,TheRod1990/SteamBot,avoak/SteamBot,GAMELASTER/SteamBot,ztizzlegaming/CSGOWinBig-SteamBot,ChalkyBrush/SteamBots,Murzyneczka/CSGOWinBig-SteamBot,fjch1997/SteamBot,waylaidwanderer/SteamTradeOffersBot,StormReaper/SteamBot,alanfort/CSGOWinBig-SteamBot,tarun200897/SteamBot,stigping/SteamBot,GoeGaming/SteamBot,xversial/SteamBot,Alex-Nabu/CSGOWinBig-SteamBot,novasdream/SteamBot,wqbill/SteamBot,GAMELASTER/SteamBot,terryhau/SteamBot,niachris/SteamBotNew,BuzzyOG/CSGOWinBig-SteamBot,wqbill/SteamBot,StormReaper/SteamBot,Jessecar96/SteamBot,icodingforfood/SteamBot,novasdream/SteamBot,Banana23/Tryout,JackHarknes/Bot1,xversial/SteamBot,23RDGit/CSGOWinBig-SteamBot,trervorx/SteamBot,Schwehn42/SteamBot,zigagrcar/SteamTradeOffersBot,Bottswana/SteamBot,alanfort/CSGOWinBig-SteamBot,Wendt9222/SteamBot-1