message: Bump the required numpy version in r1.6
diff: @@ -36,7 +36,7 @@ REQUIRED_PACKAGES = [
  'astor >= 0.6.0',
  'gast >= 0.2.0',
  'grpcio >= 1.8.6',
  - 'numpy >= 1.12.1',
  + 'numpy >= 1.13.3',
  'six >= 1.10.0',
  'protobuf >= 3.4.0',
  'tensorflow-tensorboard >= 1.5.0, < 1.6.0',
  