Convert pyproject.toml dependencies from approx equal to lower bound

[coretl]

This allows them to coexist more easily with other python deps in a single venv

Fixes #2082

[changeset-bot]

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Latest commit: cb9bae9

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[coretl]

I'm guessing that I need to add a label to this PR, but I don't seem to have permission to do this?

[agoose77]

@coretl typically we want people to install this tool in its own environment. But, as discussed in #2082, we can try loosening them for the benefits that it brings users.

You can add a label in future by naming the branch feat/XXX or fix/XXX