[pre-commit.ci] pre-commit autoupdate (#408)

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

@@ -10,7 +10,7 @@ repos:
     -   id: debug-statements
     -   id: end-of-file-fixer
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.14.0
+    rev: v2.15.0
     hooks:
     -   id: pyupgrade
         args: [--py36-plus]
@@ -19,7 +19,7 @@ repos:
     hooks:
     -   id: reorder-python-imports
 -   repo: https://github.com/psf/black
-    rev: 21.4b2
+    rev: 21.5b1
     hooks:
     -   id: black
 -   repo: https://github.com/asottile/blacken-docs
@@ -28,7 +28,7 @@ repos:
     -   id: blacken-docs
         additional_dependencies: [black]
 -   repo: https://github.com/PyCQA/flake8
-    rev: 3.9.1
+    rev: 3.9.2
     hooks:
     -   id: flake8
         additional_dependencies: [