message: Updated Estimator Version to 2.4.0-rc0
diff: @@ -97,7 +97,7 @@ REQUIRED_PACKAGES = [
  # They are updated during the release process
  # When updating these, please also update the nightly versions below
  'tensorboard ~= 2.3',
  - 'tensorflow_estimator ~= 2.3.0',
  + 'tensorflow_estimator >= 2.4.0rc0 , < 2.5.0',
  ]
  