tried to fix to-iso-string issue with Travis CI
tried to fix to-iso-string issue with Travis CI

convoyinc/apollo-client,stevewillard/apollo-client,apollostack/apollo-client,calebmer/apollo-client,calebmer/apollo-client,apollostack/apollo-client,convoyinc/apollo-client,stevewillard/apollo-client,cesarsolorzano/apollo-client,apollographql/apollo-client,cesarsolorzano/apollo-client,apollostack/apollo-client,convoyinc/apollo-client,calebmer/apollo-client,cesarsolorzano/apollo-client,stevewillard/apollo-client,apollographql/apollo-client