updated py versions

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.9
+          python-version: "3.10"
 
       - name: Install Python dependencies
         run: python -m pip install black flake8

.github/workflows/test-n-publish.yml

@@ -7,8 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
-    
+        python-version: [3.7, 3.8, 3.9, "3.10"]
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2