remove 3.6 from tests

Author: h-g-s

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", pypy3]
+        python-version: ["3.7", "3.8", "3.9", "3.10", pypy3]
         os: [macos-latest, ubuntu-18.04, ubuntu-20.04, windows-2019, windows-2016]
         exclude:
           # excludes pypy Windows because only 32 bit pypy is supported.
@@ -47,6 +47,8 @@ jobs:
           # temporarily exclude pypy3 on macos
           - os: macos-latest
             python-version: pypy3
+          - os: macos-latest
+            python-version: "3.10"
 
     steps: