message: Update tensorboard dependency to 1.11.x
diff: @@ -57,7 +57,7 @@ REQUIRED_PACKAGES = [
  'six >= 1.10.0',
  'protobuf >= 3.6.0',
  'setuptools <= 39.1.0',
  - 'tensorboard >= 1.10.0, < 1.11.0',
  + 'tensorboard >= 1.11.0, < 1.12.0',
  'termcolor >= 1.1.0',
  ]
  