update: pre-commit framework plugins

.pre-commit-config.yaml

@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v3.2.0
+  rev: v3.3.0
   hooks:
     - id: check-docstring-first
     - id: check-executables-have-shebangs
@@ -17,11 +17,11 @@ repos:
     - id: trailing-whitespace
 
 - repo: https://github.com/psf/black
-  rev: 19.10b0
+  rev: 20.8b1
   hooks:
     - id: black
 
 - repo: https://gitlab.com/pycqa/flake8
-  rev: 3.8.3
+  rev: 3.8.4
   hooks:
     - id: flake8