Bump actions/setup-python from v1 to v2.1.3

Bumps [actions/setup-python](https://github.com/actions/setup-python) from v1 to v2.1.3.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v1...c181ffa198a1248f902bc2f7965d2f9a36c2d7f6)

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

.github/workflows/pythonpackage.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         submodules: 'recursive'
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2.1.3
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies