[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/blacken-docs: v1.12.0 → v1.12.1](https://github.com/asottile/blacken-docs/compare/v1.12.0...v1.12.1)
- [github.com/asottile/pyupgrade: v2.31.0 → v2.31.1](https://github.com/asottile/pyupgrade/compare/v2.31.0...v2.31.1)
- [github.com/pre-commit/mirrors-mypy: v0.931 → v0.940](https://github.com/pre-commit/mirrors-mypy/compare/v0.931...v0.940)

.pre-commit-config.yaml

@@ -5,7 +5,7 @@ repos:
     -   id: black
         args: [--safe, --quiet, --target-version, py35]
 -   repo: https://github.com/asottile/blacken-docs
-    rev: v1.12.0
+    rev: v1.12.1
     hooks:
     -   id: blacken-docs
         additional_dependencies: [black==20.8b1]
@@ -21,7 +21,7 @@ repos:
     hooks:
     -   id: flake8
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.31.0
+    rev: v2.31.1
     hooks:
     -   id: pyupgrade
         args: [--py3-plus]
@@ -34,7 +34,7 @@ repos:
         language: python
         additional_dependencies: [pygments, restructuredtext_lint]
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.931
+    rev: v0.940
     hooks:
     -   id: mypy
         files: ^(src/|testing/)