update the pre-commit hooks (#34)

Author: keewis

.pre-commit-config.yaml

@@ -2,7 +2,7 @@
 repos:
   # isort should run before black as black sometimes tweaks the isort output
   - repo: https://github.com/timothycrosley/isort
-    rev: 5.4.2
+    rev: 5.6.4
     hooks:
       - id: isort
   # https://github.com/python/black#version-control-integration
@@ -11,10 +11,10 @@ repos:
     hooks:
       - id: black
   - repo: https://github.com/keewis/blackdoc
-    rev: v0.1.2
+    rev: v0.2
     hooks:
       - id: blackdoc
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.8.3
+    rev: 3.8.4
     hooks:
       - id: flake8