Enable tests for current Python versions.

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
@@ -29,4 +29,4 @@ jobs:
         name: examples-and-tutorials
         path: |
           examples/
-          tutorial/
+          tutorial/

setup.py

@@ -40,6 +40,9 @@ setup(
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Utilities',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         ],