build with 3.11rc2

Author: jschlyter

.github/workflows/test.yml

@@ -23,11 +23,12 @@ jobs:
     strategy:
       matrix:
         python-version:
+          - "3.6"
           - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"
-          - "3.11.0-rc.1"
+          - "3.11.0-rc.2"
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}