Merge pull request #62 from asottile/all-repos_autofix_pre-commit-flake8-migrate

Migrate to official pycqa/flake8 hooks repo

.pre-commit-config.yaml

 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.0.0
+    rev: v2.1.0
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -9,13 +9,16 @@ repos:
     -   id: debug-statements
     -   id: name-tests-test
     -   id: requirements-txt-fixer
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.7.1
+    hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-autopep8
-    rev: v1.4
+    rev: v1.4.3
     hooks:
     -   id: autopep8
 -   repo: https://github.com/asottile/reorder_python_imports
-    rev: v1.3.0
+    rev: v1.3.5
     hooks:
     -   id: reorder-python-imports
 -   repo: https://github.com/asottile/add-trailing-comma