Merge pull request #392 from sass/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: asottile

.pre-commit-config.yaml

@@ -20,7 +20,7 @@ repos:
     -   id: add-trailing-comma
         args: [--py36-plus]
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.32.1
+    rev: v2.33.0
     hooks:
     -   id: pyupgrade
         args: [--py36-plus]