build: Bump actions/setup-python from 1 to 4 (#89)

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] <support@github.com>

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

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.9
       - name: Install flake8
@@ -27,7 +27,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.9
       - run: python -m pip install isort

.github/workflows/publish-to-live-pypi.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Set up Python 3.9
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: 3.9
 

.github/workflows/publish-to-test-pypi.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Set up Python 3.9
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: 3.9
 

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
 
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -58,7 +58,7 @@ jobs:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
 
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies