[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.4b0 → 21.5b1](psf/black@21.4b0...21.5b1)
- [github.com/pycqa/flake8.git: 3.9.1 → 3.9.2](https://github.com/pycqa/flake8.git/compare/3.9.1...3.9.2)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/psf/black
-    rev: 21.4b0
+    rev: 21.5b1
     hooks:
       - id: black
         language_version: python3
@@ -19,7 +19,7 @@ repos:
       - id: check-merge-conflict
       - id: debug-statements
   - repo: https://github.com/pycqa/flake8.git
-    rev: 3.9.1
+    rev: 3.9.2
     hooks:
       - id: flake8
   - repo: https://github.com/adrienverge/yamllint.git