Add pre-commit (#140)

* Add pre-commit config files

* Add linting test on github action

pyproject.toml

@@ -0,0 +1,17 @@
+[tool.black]
+line-length = 200
+target-version = ['py36', 'py37', 'py38']
+skip-string-normalization = true
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.*
+  | \.git
+  | \.mypy_cache
+  | \.venv
+  # The following are specific to Black, you probably don't want those.
+  | blib2to3
+  | tests/data
+  | profiling
+)/
+'''