Upgrade versions of checkout, setup-python and codecov-action, in ord…

…er to remove deprecation warnings in ci pipeline.

.github/workflows/ci.yml

@@ -14,13 +14,13 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install poetry
         run: pipx install poetry
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'poetry'
@@ -35,7 +35,9 @@ jobs:
         run: poetry run pytest --cov=./ --cov-config=.coveragerc --cov-report=xml
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
         if: matrix.python-version == '3.8'
 
       - name: Look for security vulnerabilities in dependencies