Support Python 3.9

Author: PeterJCLaw

.circleci/config.yml

@@ -53,11 +53,11 @@ references:
   python-full-version-matrix: &python-full-version-matrix
     matrix:
       parameters:
-        version: ["3.6", "3.7", "3.8"]
+        version: ["3.6", "3.7", "3.8", "3.9"]
   python-top-and-bottom-version-matrix: &python-top-and-bottom-version-matrix
     matrix:
       parameters:
-        version: ["3.6", "3.8"]
+        version: ["3.6", "3.9"]
   filter-tags: &filter-tags
     filters:
       branches: