Migrate to Circle CI v2.0

[hackebrot]

Hi folks! 👋

Circle CI is dropping support for version 1.0 builds end of August, so I'm suggesting to migrate to the new build config format soon. See note in the Circle CI documentation here ⚠️

They also provide documentation on how to do the migration.

Would you be OK with a PR to also update the CI configuration to use the same mechanism for running the tests as for running the tests locally? Currently we install dependencies manually and run pytest directly as opposed to using docker-compose and the tests entrypoint

$ docker-compose run --rm server tests

[arikfr]

Would you be OK with a PR to also update the CI configuration to use the same mechanism for running the tests as for running the tests locally?

Sure! This will be greatly appreciated.