Add support for poetry extras

[abergeron]

This introduces a behaviour change with regards to previous versions. Before this optional dependencies would always be included since poetry2conda never read the optional flag. Now they are skipped by default.

I do think the change is worth it, but I wanted to point it out.

I've also ran black on the code and included the changes it did.

[dojeda]

I think I may have misunderstood a thing: I don't think extra dependencies were managed at all on previous versions, but you say that before this, optional dependencies would always be included...

Are we talking about the same extras? https://python-poetry.org/docs/pyproject/#extras

[abergeron]

Yes I am talking about those extras. And no poetry2conda didn't manage those before.

The behaviour change is that optional dependencies (marked like this: { version = "1.0", optional = true } in the regular section) would always get included before and now they aren't.

[dojeda]

Oh I see! Well the reason that optional dependencies were included was because I did not even know that poetry feature. If this PR fixes it, that's great!

[dojeda]

Excellent!

Monday is a holiday where I live so I will release a new version then, after addressing the two pending issues.

[abergeron]

Sorry there is a problem in the test due to the other PR. I'll have a fix in a couple of minutes

[dojeda]

Ah and I negligently merged : facepalm:

On Sat, May 30, 2020, 22:26 abergeron notifications@github.com wrote:

Sorry there is a problem in the test due to the other PR. I'll have a fix in a couple of minutes

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[abergeron]

I can make a new PR for the fixes, It's just updating the extras test.

[abergeron]

It's fixed in #7