add pre-commit config for pre-commit.ci

.pre-commit-config.yaml

@@ -0,0 +1,32 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.0.1
+    hooks:
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.23.3
+    hooks:
+      - id: pyupgrade
+        args: [--py37-plus, --keep-runtime-typing]
+  - repo: https://github.com/asottile/setup-cfg-fmt
+    rev: v1.17.0
+    hooks:
+      - id: setup-cfg-fmt
+  - repo: https://github.com/myint/autoflake
+    rev: v1.4
+    hooks:
+      - id: autoflake
+        args: ["--in-place", "--remove-all-unused-imports"]
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.9.3
+    hooks:
+      - id: isort
+  - repo: https://github.com/psf/black
+    rev: 21.7b0
+    hooks:
+      - id: black
+  - repo: https://github.com/PyCQA/flake8
+    rev: 3.9.2
+    hooks:
+      - id: flake8