chore: Cache Poetry dependencies and virtual environment in CI

.github/workflows/ci.yml

@@ -28,13 +28,29 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
+      - name: Cache Poetry dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pypoetry
+          key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-poetry-
+
       - name: Install Poetry
         uses: snok/install-poetry@v1
         with:
           virtualenvs-create: true
           virtualenvs-in-project: true
           installer-parallel: true
 
+      - name: Cache virtual environment
+        uses: actions/cache@v3
+        with:
+          path: .venv
+          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-venv-
+
       - name: Install dependencies
         run: |
           poetry install --no-interaction --with dev