Run Appveyor on latest LTS / stable Node versions
Run Appveyor on latest LTS / stable Node versions

For the same reasoning as the Travis change.
convoyinc/apollo-client,convoyinc/apollo-client,apollographql/apollo-client,cesarsolorzano/apollo-client,stevewillard/apollo-client,apollostack/apollo-client,calebmer/apollo-client,apollographql/apollo-client,cesarsolorzano/apollo-client,apollostack/apollo-client,convoyinc/apollo-client,apollostack/apollo-client,calebmer/apollo-client,cesarsolorzano/apollo-client,calebmer/apollo-client,stevewillard/apollo-client,stevewillard/apollo-client