message: Bump Rust port to 0.6.1
diff: [package]
  name = "flatbuffers"
  -version = "0.6.0"
  +version = "0.6.1"
  authors = ["Robert Winslow <hello@rwinslow.com>", "FlatBuffers Maintainers"]
  license = "Apache-2.0"
  description = "Official FlatBuffers Rust runtime library."
  