[pre-commit.ci] pre-commit autoupdate (#669)

updates:
- [github.com/psf/black: 21.4b2 → 21.5b1](https://github.com/psf/black/compare/21.4b2...21.5b1)
- [github.com/asottile/pyupgrade: v2.14.0 → v2.15.0](https://github.com/asottile/pyupgrade/compare/v2.14.0...v2.15.0)
- [github.com/PyCQA/flake8: 3.9.1 → 3.9.2](https://github.com/PyCQA/flake8/compare/3.9.1...3.9.2)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -19,7 +19,7 @@ repos:
   - id: isort
 
 - repo: https://github.com/psf/black
-  rev: 21.4b2
+  rev: 21.5b1
   hooks:
   - id: black
 
@@ -43,7 +43,7 @@ repos:
     args: ["--python-version=3.7", "--ignore-missing-imports", "--scripts-are-modules"]
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.14.0
+  rev: v2.15.0
   hooks:
   - id: pyupgrade
     name: PyUpgrade 3.6+
@@ -55,7 +55,7 @@ repos:
     args: ["--py37-plus"]
 
 - repo: https://github.com/PyCQA/flake8
-  rev: 3.9.1
+  rev: 3.9.2
   hooks:
   - id: flake8
     exclude: cibuildwheel/resources/