💚 Add Python 3.8 to Gitlab CI

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: python:3.6
+image: python:3.8
 
 stages:
   - test
@@ -17,8 +17,13 @@ py37-django22:
   stage: test
   script: tox -e py37-django22
 
+py38-django22:
+  image: python:3.8
+  stage: test
+  script: tox -e py38-django22
+
 linters:
-  image: python:3.6
+  image: python:3.8
   stage: quality-assurance
   script: tox -e linters