ci: update versions

Author: zmoon

.github/workflows/ci.yml

@@ -15,21 +15,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.9"]
+        python-version: ["3.7", "3.10"]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel
           python -m pip install flit
-          flit install -s
+          flit install
 
       - name: Test with pytest
         run: |
@@ -47,7 +47,7 @@ jobs:
           done
 
       - name: Upload test coverage data to Codecov
-        if: ${{ matrix.python-version == '3.9' }}
+        if: ${{ matrix.python-version == '3.10' }}
         uses: codecov/codecov-action@v2
         with:
           files: ./coverage.xml