pip upgrade and build backend install

Author: mhubii

.github/workflows/tests.yaml

@@ -53,10 +53,14 @@ jobs:
       #     use-github-cache: false
       #     use-local-cache: false
 
+      # Upgrade pip and install build backend
+      - name: Upgrade pip & install build tools
+        run: |
+          python -m pip install --upgrade pip setuptools wheel --no-cache-dir
+
       # Install roboreg (and its dependencies from pyproject.toml).
       - name: Install package and dependencies
         run: |
-          python -m pip install --upgrade pip --no-cache-dir
           pip install . --no-build-isolation --no-cache-dir
 
       # Run tests with pytest.