ci: add cache

.github/workflows/coverage.yml

@@ -10,20 +10,32 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    strategy:
+      matrix:
+        python-version: [3.10]
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set up Python 3.10
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: ${{ matrix.python-version }}
+
+      - name: Cache Python dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
-          pip install coverage codecov unittest-xml-reporting
+          pip install coverage codecov
 
       - name: Run tests and generate coverage report
         run: |