Update netdisco

[balloob]

Description:

This updates the netdisco dependency to 1.0

I also realized that our current test requirements can be trimmed down a lot more. Most things are only imported but not used in tests because they are mocked out.

Example entry for configuration.yaml (if applicable):

discovery:

Checklist:

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[mention-bot]

@balloob, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fabaff, @postlund and @rmkraus to be potential reviewers.