add python tooling configuration

pyproject.toml

@@ -0,0 +1,10 @@
+[tool.black]
+line-length = 88
+py36 = true
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.git
+  | \.mypy_cache
+)/
+'''

setup.cfg

@@ -0,0 +1,17 @@
+[wheel]
+universal = 1
+
+[pycodestyle]
+max-line-length = 88
+ignore = E501,E741,W503
+
+[flake8]
+max-line-length = 88
+ignore = E501,E741,W503
+exclude = .git,__pycache__,docs/source/conf.py,old,build,dist
+
+[mypy]
+warn_redundant_casts = true
+disallow_untyped_calls = true
+disallow_untyped_defs = true
+no_implicit_optional = true