Upgrade pip in CI (#566)

See setuptools_csm issue

Author: therve

.github/workflows/test.yml

@@ -51,6 +51,10 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Upgrade pip
+        run: |
+          python -m pip install --upgrade pip
+          pip install --upgrade wheel setuptools build
       - name: Install
         run: pip install --disable-pip-version-check -e .[tests]
       - name: Test

.github/workflows/test_integration.yml

@@ -53,6 +53,10 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: 3.8
+      - name: Upgrade pip
+        run: |
+          python -m pip install --upgrade pip
+          pip install --upgrade wheel setuptools build
       - name: Install
         run: pip install --disable-pip-version-check -e .[apm,tests]
       - name: Test