[pre-commit.ci] pre-commit autoupdate (#72)

updates:
- [github.com/asottile/pyupgrade: v2.12.0 → v2.14.0](asottile/pyupgrade@v2.12.0...v2.14.0)
- [github.com/psf/black: 20.8b1 → 21.4b2](psf/black@20.8b1...21.4b2)
- [github.com/PyCQA/flake8: 3.9.0 → 3.9.1](PyCQA/flake8@3.9.0...3.9.1)

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

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.12.0
+    rev: v2.14.0
     hooks:
       - id: pyupgrade
         args:
@@ -22,13 +22,13 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/psf/black
-    rev: 20.8b1
+    rev: 21.4b2
     hooks:
       - id: black
         args:
           - --safe
   - repo: https://github.com/PyCQA/flake8
-    rev: 3.9.0
+    rev: 3.9.1
     hooks:
       - id: flake8
         additional_dependencies: