Bump actions/setup-python from 2.3.1 to 3.1.2 (#10)

* Bump actions/setup-python from 2.3.1 to 3.1.2

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2.3.1 to 3.1.2.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2.3.1...v3.1.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

* Update PyPy test strategy

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

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/[email protected]
       - name: Set Up Python
-        uses: actions/setup-python@v2.3.1
+        uses: actions/setup-python@v3.1.2
         with:
           python-version: '3.8'
       - name: Install dependencies
@@ -32,11 +32,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [ '3.6', '3.7', '3.8', '3.9', '3.10', 'pypy3' ]
+        python:
+          - '3.6'
+          - '3.7'
+          - '3.8'
+          - '3.9'
+          - '3.10'
+          - 'pypy-3.7'
+          - 'pypy-3.8'
+          - 'pypy-3.9'
     steps:
       - uses: actions/[email protected]
       - name: Set Up Python
-        uses: actions/setup-python@v2.3.1
+        uses: actions/setup-python@v3.1.2
         with:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
@@ -60,7 +68,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set Up Python
-        uses: actions/setup-python@v2.3.1
+        uses: actions/setup-python@v3.1.2
         with:
           python-version: '3.8'
       - name: Install dependencies