[ci] #403: Introduce pyupgrade job

based on pre-commit

.gitlab-ci.yml

@@ -54,6 +54,14 @@ isort:
   script:
     - pre-commit run --all-files isort
 
+pyupgrade:
+  extends:
+    - .code_changes
+    - .pre-commit
+  stage: checks
+  script:
+    - pre-commit run --all-files pyupgrade
+
 .tests:
   extends: .changes
   stage: tests