Bump tensorflow from 2.0.0 to 2.0.1 in /ml_engine/online_prediction (#2751)

* Bump tensorflow from 2.0.0 to 2.0.1 in /ml_engine/online_prediction

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.0.0 to 2.0.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.0.0...v2.0.1)

Signed-off-by: dependabot[bot] <support@github.com>

* fix: specify tensorflow version

* Fix python2 tf version

Co-authored-by: Leah E. Cole <6719667+leahecole@users.noreply.github.com>

Author: dependabot[bot]

ml_engine/online_prediction/requirements.txt

@@ -1,4 +1,5 @@
-tensorflow==2.0.0
+tensorflow==2.0.1; python_version > "3.0"
+tensorflow==1.15.0; python_version < "3.0"
 google-api-python-client==1.7.11
 google-auth==1.10.0
 google-auth-httplib2==0.0.3