updated requirements

requirements.txt

-absl-py==0.7.0
-astor==0.7.1
 editdistance==0.5.2
-gast==0.3.3
-grpcio==1.33.2
-h5py==2.10.0
-Keras-Applications==1.0.8
-Keras-Preprocessing==1.1.2
-Markdown==3.3.3
-numpy==1.18.5
+lmdb==1.0.0
+matplotlib==3.2.1
+numpy==1.19.5
 opencv-python==4.4.0.46
-protobuf==3.14.0
-six==1.12.0
-tensorboard==2.4.0
+path==15.0.0
+tensorflow==2.4.0
\ No newline at end of file
-tensorflow==2.3.1
-termcolor==1.1.0
-Werkzeug==1.0.1
\ No newline at end of file