run pre-commit run --all

.pre-commit-config.yaml

@@ -1,4 +1,20 @@
 repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v2.4.0
+  hooks:
+  - id: trailing-whitespace
+  - id: end-of-file-fixer
+  - id: check-docstring-first
+  - id: check-yaml
+  - id: debug-statements
+  - id: check-ast
+
+- repo: https://github.com/asottile/pyupgrade
+  rev: v1.25.2
+  hooks:
+  - id: pyupgrade
+    args: ['--py36-plus']
+
 - repo: https://github.com/python/black
   rev: stable
   hooks: