Add support for Python 3.10

Author: hugovk

.github/workflows/deploy.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.10
 
       - name: Install dependencies
         run: |

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
             "3.7",
             "3.8",
             "3.9",
-            "3.10-dev",
+            "3.10",
             "pypy2",
         ]
         os: [ubuntu-latest]

setup.py

@@ -28,6 +28,7 @@ def local_scheme(version):
           "Programming Language :: Python :: 3.7",
           "Programming Language :: Python :: 3.8",
           "Programming Language :: Python :: 3.9",
+          "Programming Language :: Python :: 3.10",
           "Programming Language :: Python :: Implementation :: CPython",
           "Programming Language :: Python :: Implementation :: PyPy",
           "Topic :: Communications :: Chat :: Internet Relay Chat",