Merge pull request #85 from Helene/circleci_docker_version

update Docker version in config.yml

Author: Helene

.circleci/config.yml

@@ -25,7 +25,7 @@ jobs:
             flake8 --max-line-length=999 --ignore=E731,E741,E712,E722,W503 --exclude=venv* --statistics
             nose2
       - setup_remote_docker:
-          version: 19.03.13
+          version: 20.10.17
       - run:
           name: Build Docker image
           command: |