Fixing codecov upload (#197)

* fix upload

* use token

* update version

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Set up Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python }}
           architecture: x64
@@ -52,9 +52,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/download-artifact@v2
+        with:
+          name: coverage-main
+          path: ./coverage.xml
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v3
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}  # Use the Codecov token from secrets
           flags: unittests
           fail_ci_if_error: true
 
@@ -82,10 +86,8 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -e ".[docs]" --upgrade
-
       - name: Build documentation
         run: sphinx-build docs/source docs/build -a
-
       - name: Documentation sanity check
         run: test -e docs/build/index.html || exit