update precommit

Author: bagerard

.pre-commit-config.yaml

@@ -8,15 +8,15 @@ repos:
       - id: trailing-whitespace
       - id: end-of-file-fixer
   - repo: https://github.com/ambv/black
-    rev: 20.8b1
+    rev: 21.4b2
     hooks:
       - id: black
   - repo: https://gitlab.com/pycqa/flake8
     rev: 3.9.1
     hooks:
       - id: flake8
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.13.0
+    rev: v2.14.0
     hooks:
       - id: pyupgrade
         args: [--py36-plus]