Upgraded pip and setuptools.

.github/workflows/windows.yml

@@ -58,10 +58,12 @@ jobs:
       with:
         python-version: ${{matrix.python-version}}
         architecture: ${{matrix.architecture}}
-    - name: Install library
+
+    - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install --upgrade pip setuptools
         pip install mypy xmltodict wheel
         pip install -e . -v
+
     - name: Run unit tests
       run: python -m unittest -v