Add python3.11 to CI (#108)

* Add python 3.11 to CI

* Exclude python 3.11 from macos test

Author: cffls

.github/workflows/main.yml

@@ -14,7 +14,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: [3.7, 3.8, 3.9, '3.10']
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11']
+        exclude:
+          # excludes python 3.11 on macOS
+          - os: macos-latest
+            python-version: '3.11'
 
     steps:
       - uses: actions/checkout@v3