Add flake8 and isort config

Author: tony

setup.cfg

@@ -0,0 +1,53 @@
+[flake8]
+exclude = .*/,.tox,*.egg,qencode/_compat.py,qencode/__*__.py,
+select = E,W,F,N
+max-line-length = 88
+# Stuff we ignore thanks to black: https://github.com/ambv/black/issues/429
+ignore = E111,
+         E121,
+         E122,
+         E123,
+         E124,
+         E125,
+         E126,
+         E201,
+         E202,
+         E203,
+         E221,
+         E222,
+         E225,
+         E226,
+         E227,
+         E231,
+         E241,
+         E251,
+         E261,
+         E262,
+         E265,
+         E271,
+         E272,
+         E302,
+         E303,
+         E306,
+         E502,
+         E701,
+         E702,
+         E703,
+         E704,
+         W291,
+         W292,
+         W293,
+         W391,
+         W503
+
+[isort]
+combine_as_imports= true
+default_section = THIRDPARTY
+include_trailing_comma = true
+multi_line_output = 3
+known_pytest = pytest,py
+known_first_party = qencode
+split_before_closing_bracket = true
+sections = FUTURE,STDLIB,PYTEST,THIRDPARTY,FIRSTPARTY,LOCALFOLDER
+line_length = 88
+not_skip = __init__.py