lint: Configure isort for py files.
ADD
pyproject.toml
+[tool.isort]
+src_paths = ["tools", "zulip", "zulip_bots", "zulip_botserver"]
+profile = "black"
+line_length = 100

MODIFY
requirements.txt
requirements.txt
crayons
twine
coverage>=4.4.1
+isort
flake8
mock
pytest

lint: Configure isort for py files.