fix: dismiss python 3.6 tests for now

Author: oesteban

.github/workflows/pythonpackage.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.7, 3.8]
         pip: ["pip~=18.1", "pip>=20.3"]
         setuptools: ["setuptools==38.4.1", "setuptools"]