Merge pull request #55 from PyCQA/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: asottile

.pre-commit-config.yaml

@@ -18,7 +18,7 @@ repos:
     -   id: black
         args: [--line-length=79]
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.4.0
+    rev: v3.6.0
     hooks:
     -   id: pyupgrade
         args: [--py37-plus]