isort compatibility warning

[w2vy]

`tom@rnode:/home/tom/RChain/pyrchain$ isort --recursive --check-only rchain
/home/tom/.local/lib/python3.8/site-packages/isort/settings.py:456: UserWarning: W0503: Deprecated config options were used: not_skip.Please see the 5.0.0 upgrade guide: bit.ly/isortv5.
warn(
Skipped 1 files
/home/tom/.local/lib/python3.8/site-packages/isort/main.py:1206: UserWarning: W0501: The following deprecated CLI flags were used and ignored: --recursive!
warn(
/home/tom/.local/lib/python3.8/site-packages/isort/main.py:1210: UserWarning: W0500: Please see the 5.0.0 Upgrade guide: https://pycqa.github.io/isort/docs/upgrade_guides/5.0.0/
warn(
tom@rnode:/home/tom/RChain/pyrchain$ which isort
/home/tom/.local/bin/isort
tom@rnode:/home/tom/RChain/pyrchain$ isort --version

             _                 _
            (_) ___  ___  _ __| |_
            | |/ _/ / _ \/ '__  _/
            | |\__ \/\_\/| |  | |_
            |_|\___/\___/\_/   \_/

  isort your imports, so you don't have to.

                VERSION 5.8.0

tom@rnode:/home/tom/RChain/pyrchain$

`
Ubuntu 20.10