Update pre-commit hooks

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ default_language_version:
 exclude: snapshots/
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.5.0
+    rev: v3.3.0
     hooks:
       - id: trailing-whitespace
         exclude: ^.*\.md$
@@ -16,16 +16,16 @@ repos:
       - id: check-merge-conflict
 
   - repo: https://github.com/asottile/seed-isort-config
-    rev: v2.1.0
+    rev: v2.2.0
     hooks:
       - id: seed-isort-config
 
   - repo: https://github.com/timothycrosley/isort
-    rev: 4.3.21
+    rev: 5.6.4
     hooks:
       - id: isort
 
   - repo: https://github.com/psf/black
-    rev: 19.10b0
+    rev: 20.8b1
     hooks:
       - id: black