Use setup-python's cache instead of cache action

See setup-python's docs on caching:
https://github.com/actions/setup-python/blob/main/docs/advanced-usage.md#caching-packages

Author: ddabble

.github/workflows/test.yml

@@ -65,20 +65,10 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-
-      - name: Get pip cache dir
-        id: pip-cache
-        run: |
-          echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
-
-      - name: Cache
-        uses: actions/cache@v3
-        with:
-          path: ${{ steps.pip-cache.outputs.dir }}
-          key:
-            ${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}-${{ hashFiles('**/tox.ini') }}
-          restore-keys: |
-            ${{ matrix.python-version }}-v1-
+          cache: 'pip'
+          cache-dependency-path: |
+            setup.py
+            tox.ini
 
       - name: Install dependencies
         run: |