update ruby versions for tests
update ruby versions for tests

msgpack/msgpack-ruby,cosmo0920/msgpack-ruby,cosmo0920/msgpack-ruby,cosmo0920/msgpack-ruby,msgpack/msgpack-ruby,cosmo0920/msgpack-ruby,msgpack/msgpack-ruby,ojundt/msgpack-ruby,ojundt/msgpack-ruby,ojundt/msgpack-ruby,ojundt/msgpack-ruby