Use Python 3.10 in check job (#146)

Author: andrewheard

.github/workflows/check.yml

@@ -19,7 +19,7 @@ jobs:
 
     - uses: actions/setup-python@v4
       with:
-        python-version: 3.6
+        python-version: '3.10'
 
     - name: Cache Mint packages
       uses: actions/cache@v3