Bump actions/setup-python from 3 to 4 (#765)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 3 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>

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

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Setup python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.PYTHON.VERSION }}
       - name: Install tox and coverage
@@ -72,7 +72,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Setup python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.PYTHON.VERSION }}
       - name: Install tox and coverage
@@ -103,7 +103,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Setup python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.PYTHON.VERSION }}
           architecture: ${{ matrix.WINDOWS.ARCH }}

.github/workflows/wheel-builder.yml

@@ -120,7 +120,7 @@ jobs:
           ref: ${{ github.event.inputs.version || github.ref }}
           persist-credentials: false
       - name: Setup python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.PYTHON.VERSION }}
           architecture: ${{ matrix.WINDOWS.ARCH }}