update tests to run on python3.8

Author: camelpac

.circleci/config.yml

@@ -2,10 +2,10 @@ version: 2
 jobs:
   build-python36:
     docker:
-      - image: python:3.6.7
+      - image: python:3.8.11
     working_directory: ~/repo
     steps:
-      - run: echo "hello python 3.6.7"
+      - run: echo "hello python 3.8.11"
       - checkout
 
       # Download and cache dependencies
@@ -23,7 +23,6 @@ jobs:
       - run:
           name: run tests
           command: |
-            pip install pandas==1.1.5 numpy==1.19.4 scipy==1.5.4
             pip install flake8 && flake8
             python setup.py develop
             python setup.py test
@@ -34,11 +33,11 @@ jobs:
           key: v1-dependencies-{{ checksum "setup.py" }}
 
       - store_artifacts:
-          path: test-reports3.6.7
-          destination: test-reports3.6.7
+          path: test-reports3.8.11
+          destination: test-reports3.8.11
 
 workflows:
   version: 2
   build:
     jobs:
-      - build-python36
+      - build-python38