Bump actions/setup-python from 1 to 4 (#145)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 1 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v1...v4)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/pypi.yml

@@ -16,7 +16,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Python
-      uses: actions/setup-python@v4.7.0
+      uses: actions/setup-python@v4
       with:
         python-version: 3.9
 
@@ -52,7 +52,7 @@ jobs:
       contents: read
       id-token: write
     steps:
-    - uses: actions/setup-python@v4.7.0
+    - uses: actions/setup-python@v4
       name: Install Python
       with:
         python-version: 3.9

.github/workflows/pytest.yml

@@ -8,7 +8,7 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
           python-version: "3.x"
       - name: Install dependencies