Merge pull request #527 from eriknw/py310

Run Python 3.10 and latest 3.11 dev in CI

Author: eriknw

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, "3.10-dev", "pypy-3.6", "pypy-3.7"]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, "3.10", "pypy-3.6", "pypy-3.7", "pypy-3.8"]
     steps:
       - name: Checkout
         uses: actions/checkout@v2