Merge pull request #9 from strawberry-graphql/pre-commit-ci-update-config

Author: jkimbo

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
         exclude: CHANGELOG.md
 
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v2.4.0
+    rev: v2.4.1
     hooks:
       - id: prettier
         files: '.*\.mdx?$'
@@ -32,6 +32,6 @@ repos:
         args: ['--in-place', '--remove-all-unused-imports', '--remove-unused-variable']
 
   - repo: https://github.com/psf/black
-    rev: 21.8b0
+    rev: 21.9b0
     hooks:
       - id: black