Update test action

.github/workflows/tests.yml

@@ -20,26 +20,20 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.8
+    - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: "3.8"
+        python-version: "3.10"
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest pytest-cov wheel
         pip install -e .
-    - name: Lint with flake8
-      run: |
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Run unit and system tests
       run: |
         pytest --cov=ppx tests/
     - name: Upload coverage to codecov
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v2
       with:
         fail_ci_if_error: true