Build for v0.20

[registerrier]

Checklist

• [x ] Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• [x ] Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• Recipes should usually depend on matplotlib-base as opposed to matplotlib so that runtime environments do not require large packages like qt.

[registerrier]

@conda-forge-admin, please rerender

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipe) and found some lint.

Here's what I've got...

For recipe:

• Old-style Python selectors (py27, py35, etc) are only available for Python 2.7, 3.4, 3.5, and 3.6. Please use explicit comparisons with the integer py, e.g. # [py==37] or # [py>=37]. See lines [16]

For recipe:

• Recipes should usually depend on matplotlib-base as opposed to matplotlib so that runtime environments do not require large packages like qt.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• Recipes should usually depend on matplotlib-base as opposed to matplotlib so that runtime environments do not require large packages like qt.

[registerrier]

@conda-forge-admin, please rerender

[registerrier]

@conda-forge-admin, please rerender

[registerrier]

@conda-forge-admin, please rerender

[mwcraig]

@registerrier -- I think the pip release yesterday may have broken things. Can you try restricting pip to <22.1 to see if that fixes t prob?

[registerrier]

@conda-forge-admin, please rerender

[mwcraig]

That is progress -- it looks like the issue now is that the license file is not where the recipe expects it to be.

[registerrier]

@conda-forge-admin, please rerender

[mwcraig]

You might want to change the pip pin to pip !=22.1 so that when a new pip is released you will pick that up. Based on the discussion in pypa/pip#11116 it sounds like this will be fixed in pip.

[adonath]

Thanks a lot @mwcraig for your help!