update pre-commit hooks

Author: lovasoa

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.31.0 # Later versions do not support python 3.6
+  rev: v2.32.0
   hooks:
   - id: pyupgrade
     args: ["--py36-plus"]
@@ -15,13 +15,13 @@ repos:
   - id: flake8
     additional_dependencies: ['flake8-bugbear==19.8.0']
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.931 # Later versions do not support python 3.6
+  rev: v0.942
   hooks:
   - id: mypy
     additional_dependencies: [marshmallow-enum,typeguard,marshmallow]
     args: [--show-error-codes]
 - repo: https://github.com/asottile/blacken-docs
-  rev: v1.12.0 # Later versions do not support python 3.6
+  rev: v1.12.1
   hooks:
   - id: blacken-docs
     additional_dependencies: [black==19.3b0]