Merge pull request #7 from ftlabs/dependabot/pip/src/tensorflow-1.15.2

Bump tensorflow from 1.15.0 to 1.15.2 in /src

Author: Sqyphen

src/requirements.txt

@@ -25,7 +25,7 @@ regex==2017.4.5
 requests==2.21.0
 six==1.12.0
 tensorboard==1.13.1
-tensorflow==1.15.0
+tensorflow==1.15.2
 tensorflow-estimator==1.13.0
 termcolor==1.1.0
 tqdm==4.31.1