exclude Mac OSX on Python 3.10

Author: zacharyburnett

.github/workflows/tests.yml

@@ -46,6 +46,9 @@ jobs:
       matrix:
         os: [ ubuntu-latest, macos-latest ]
         python-version: [ '3.7', '3.8', '3.9', '3.x' ]
+        exclude:
+          - os: macos-latest
+            python-version: '3.x'
     steps:
       - name: clone repository
         uses: actions/checkout@v2