message: Upgrade tensorflow pip dependency version to 3.4.0+
diff: @@ -35,7 +35,7 @@ REQUIRED_PACKAGES = [
  'enum34 >= 1.1.6',
  'numpy >= 1.12.1',
  'six >= 1.10.0',
  - 'protobuf >= 3.3.0',
  + 'protobuf >= 3.4.0',
  'tensorflow-tensorboard >= 0.1.0, < 0.2.0',
  ]
  