[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v2.25.0 → v2.29.0](asottile/pyupgrade@v2.25.0...v2.29.0)
- [github.com/psf/black: 21.8b0 → 21.9b0](psf/black@21.8b0...21.9b0)
- [github.com/PyCQA/doc8: 0.9.0 → 0.9.1](PyCQA/doc8@0.9.0...0.9.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -10,7 +10,7 @@ repos:
     -   id: debug-statements
     -   id: end-of-file-fixer
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.25.0
+    rev: v2.29.0
     hooks:
     -   id: pyupgrade
         args: [--py36-plus]
@@ -19,7 +19,7 @@ repos:
     hooks:
     -   id: reorder-python-imports
 -   repo: https://github.com/psf/black
-    rev: 21.8b0
+    rev: 21.9b0
     hooks:
     -   id: black
 -   repo: https://github.com/asottile/blacken-docs
@@ -47,7 +47,7 @@ repos:
             Pygments,
         ]
 -   repo: https://github.com/PyCQA/doc8
-    rev: 0.9.0
+    rev: 0.9.1
     hooks:
     -   id: doc8
 # -   repo: https://github.com/codespell-project/codespell