message: Update keras and estimator deps
diff: @@ -102,8 +102,8 @@ REQUIRED_PACKAGES = [
  # They are updated during the release process
  # When updating these, please also update the nightly versions below
  'tensorboard ~= 2.6',
  - 'tensorflow-estimator >= 2.6.0rc0 , < 2.7.0',
  - 'keras >= 2.6.0rc1 , < 2.7.0',
  + 'tensorflow_estimator ~= 2.6',
  + 'keras ~= 2.6',
  ]
  @@ -117,9 +117,9 @@ if 'tf_nightly' in project_name:
  if 'tensorboard' in pkg:
  REQUIRED_PACKAGES[i] = 'tb-nightly ~= 2.7.0.a'
  elif 'tensorflow_estimator' in pkg:
  - REQUIRED_PACKAGES[i] = 'tf-estimator-nightly ~= 2.6.0.dev'
  + REQUIRED_PACKAGES[i] = 'tf-estimator-nightly ~= 2.7.0.dev'
  elif 'keras' in pkg and 'keras_preprocessing' not in pkg:
  - REQUIRED_PACKAGES[i] = 'keras-nightly ~= 2.6.0.dev'
  + REQUIRED_PACKAGES[i] = 'keras-nightly ~= 2.7.0.dev'
  # grpcio does not build correctly on big-endian machines due to lack of
  