Bump version to 2.2.1.

Author: mittinatten

.github/workflows/test-push.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
           cache: "pip"
       - name: Install dependencies
         run: |

setup.py

@@ -56,7 +56,7 @@
 
 setup(
     name='freesasa',
-    version= '2.2.0.post3',
+    version= '2.2.1',
     description='Calculate solvent accessible surface areas of proteins',
     long_description=long_description,
     author='Simon Mitternacht',