Update requirements.txt

requirements.txt

@@ -1,9 +1,9 @@
-opencv-python~=4.6.0.66
-numpy~=1.18.5
-py2exe~=0.11.0.1
-matplotlib~=3.3.4
-Pillow~=8.4.0
-keras~=2.10.0
-scikit-image~=0.17.2
-scikit-learn~=0.24.2
-tqdm~=4.64.1
+opencv-python
+numpy==1.18.5
+matplotlib
+Pillow
+keras
+scikit-image
+scikit-learn
+tqdm
+tensorflow