keeping support for 3.6

Author: Matias Melograno

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.6'
 
       - name: Install dependencies
         run: |