Update Travis config
Update Travis config

appsignal/appsignal-ruby,appsignal/appsignal-ruby,matrinox/appsignal-ruby,matrinox/appsignal-ruby,stijnster/appsignal-ruby,stijnster/appsignal-ruby,stijnster/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal,appsignal/appsignal,appsignal/appsignal-ruby,appsignal/appsignal-ruby