Upload new version of the requirements.

WaterQualityPredictions/requirements.txt

+pandas==0.25.1
+requests==2.22.0
+matplotlib==3.1.1
+seaborn==0.11.0
+sklearn
+scikit-learn==0.21.3
+numpy==1.16.5
+matplotlib==3.1.1
+joblib==0.13.2
+pytz
+flask==1.1.2