tests: conflicting test requirements/deps

[kaiogu]

Please provide information about your setup

$ dvc --version
0.86.5+ffa8fe

I'm running Ubuntu 19.10 and installed via pip from source. I tried following the instructions in the contribution guidelines but got a fatal error (issue opened here). After working around that, I managed to build, but got two non-fatal errors:

ERROR: python-dev-tools 2020.2.5 has requirement pydocstyle==5.0.2, but you'll have pydocstyle 3.0.0 which is incompatible.
ERROR: moto 1.3.14.dev464 has requirement idna<2.9,>=2.5, but you'll have idna 2.9 which is incompatible.

[efiop]

Discord context https://discordapp.com/channels/485586884165107732/565699007037571084/681167250455003210

The error occurs while pip install -e '.[all,tests]'

[skshetry]

This might no longer be an issue as we have updated the tests dependencies to the latest version. And, we haven't received any other reports for a long time. Closing ...