Add pyupgrade and django-upgrade pre-commit hooks

Author: matthiask

.pre-commit-config.yaml

@@ -14,6 +14,16 @@ repos:
     rev: 0.10.1
     hooks:
     -   id: doc8
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v2.29.1
+    hooks:
+    -   id: pyupgrade
+        args: [--py36-plus]
+-   repo: https://github.com/adamchainz/django-upgrade
+    rev: 1.4.0
+    hooks:
+    -   id: django-upgrade
+        args: [--target-version, "3.2"]
 -   repo: https://github.com/pycqa/isort
     rev: 5.10.1
     hooks: