Pin Werkzeug==2.3.8 for Flask 2.2.3 compatibility

Flask 2.2.3 imports url_quote from werkzeug.urls which was removed
in Werkzeug 3.x. Pin to 2.3.8 to fix CI ImportError. Also add
urllib3<2 to CI install command.

Author: damsolanke

.github/workflows/ci.yml

@@ -21,8 +21,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install Flask==2.2.3 flask-socketio==5.5.1 pandas==1.5.3 numpy==1.24.3 \
-            scikit-learn==1.3.0 requests==2.28.2 pytest==7.4.0 pytest-flask==1.2.0 \
+          pip install Flask==2.2.3 Werkzeug==2.3.8 flask-socketio==5.5.1 pandas==1.5.3 numpy==1.24.3 \
+            scikit-learn==1.3.0 requests==2.28.2 "urllib3<2" pytest==7.4.0 pytest-flask==1.2.0 \
             python-dotenv==1.0.0 plotly==5.14.1 matplotlib==3.7.1 seaborn==0.12.2
 
       - name: Run tests

requirements.txt

@@ -2,6 +2,7 @@
 
 # Web Framework
 Flask==2.2.3
+Werkzeug==2.3.8
 flask-socketio==5.5.1
 
 # Data Processing