adds r-mashr

[mfansler]

Adds CRAN package mashr as r-mashr. Recipe generated with conda_r_skeleton_helper with stdlib entries, cross-compilation dependencies, and SPDX license added.

Needed for Bioconductor 3.19.

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged).
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• Build number is 0.
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[conda-forge-webservices]

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 (recipes/r-mashr/meta.yaml) and found some lint.

Here's what I've got...

For recipes/r-mashr/meta.yaml:

• The following maintainers have not yet confirmed that they are willing to be listed here: conda-forge/r. Please ask them to comment on this PR if they are.

[mfansler]

@conda-forge/help-r ready for review 🙏

I'm skipping win-64 - it is not required for Bioconductor 3.19 and we can revisit it on the feedstock in the UCRT migration.