ci: pre-commit autoupdate (#109)

updates:
- [github.com/adamchainz/django-upgrade: 1.12.0 → 1.13.0](adamchainz/django-upgrade@1.12.0...1.13.0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
           - id: pyupgrade
             args: ["--py37-plus"]
     - repo: https://github.com/adamchainz/django-upgrade
-      rev: "1.12.0"
+      rev: "1.13.0"
       hooks:
           - id: django-upgrade
             args: [--target-version, "2.2"]