message: compat: Update forward compatibility horizon to 2018-09-16
diff: @@ -26,7 +26,7 @@ import datetime
  from tensorflow.python.util import tf_contextlib
  from tensorflow.python.util.tf_export import tf_export
  -_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2018, 9, 15)
  +_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2018, 9, 16)
  @tf_export("compat.forward_compatible")
  