Refactor cibuildwheel.yml in line with latest docs

See https://cibuildwheel.readthedocs.io/en/stable/setup/#github-actions

.github/workflows/cibuildwheel.yml

@@ -11,7 +11,7 @@ jobs:
         os: [ubuntu-20.04, windows-2019, macOS-11]
     env:
       # Seems to have trouble parsing our setup.py, thus:
-      CIBW_PROJECT_REQUIRES_PYTHON: ">=3.8"
+      CIBW_PROJECT_REQUIRES_PYTHON: ">=3.7"
       # Install numpy with a wheel (do NOT compile it):
       CIBW_BEFORE_BUILD: "pip install --only-binary :all: -r requirements.txt"
       # There are/were no numpy wheels for these:
@@ -20,7 +20,7 @@ jobs:
       CIBW_TEST_COMMAND: "python {package}/Tests/test_Cluster.py"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Optional
           submodules: true  # Optional, use if you have submodules
@@ -33,11 +33,12 @@ jobs:
           git checkout biopython-181
           cd ..
 
-      # Could not work out how to give package path with
-      # uses: pypa/[email protected]
+
       - name: Build wheels
-        run: |
-          pipx run cibuildwheel==2.16.2 --output-dir wheelhouse biopython
+        uses: pypa/[email protected]
+        with:
+          package-dir biopython
+          output-dir: wheelhouse
 
       - uses: actions/upload-artifact@v3
         with: