update tests

Author: LiamConnors

.circleci/config.yml

@@ -1,9 +1,9 @@
 version: 2
 
 jobs:
-    python-3.6: &test-template
+    python-3.8: &test-template
         docker:
-            - image: circleci/python:3.6-stretch-node-browsers
+            - image: circleci/python:3.8-stretch-node-browsers
               auth:
                 username: dashautomation
                 password: $DASH_PAT_DOCKERHUB
@@ -45,9 +45,9 @@ jobs:
                     pytest
                 when: always
 
-    python-3.7-install-test:
+    python-3.12-install-test:
         docker:
-            - image: circleci/python:3.7-stretch-node-browsers
+            - image: circleci/python:3.12-stretch-node-browsers
               auth:
                 username: dashautomation
                 password: $DASH_PAT_DOCKERHUB
@@ -102,7 +102,7 @@ workflows:
     version: 2
     build:
         jobs:
-            - python-3.6:
+            - python-3.8:
                 context: dash-docker-hub
-            - python-3.7-install-test:
+            - python-3.12-install-test:
                 context: dash-docker-hub