updated requirements to include tf1.4

Author: Gowtham Ayna Raveendran

requirements.txt

@@ -16,6 +16,7 @@ scikit-learn==0.22.2.post1
 scipy==1.4.1
 six==1.14.0
 sklearn==0.0
+tensorflow==1.4.1
 tensorflow-gpu==1.4.1
 tensorflow-tensorboard==0.4.0
 termcolor==1.1.0