drop 3.6 req, EOL

Author: brentru

.github/workflows/build.yml

@@ -20,10 +20,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python 3.6
+    - name: Set up Python
       uses: actions/setup-python@v4
-      with:
-        python-version: 3.6
 
     - name: Install dependencies
       run: |