[ci skip] [cf admin skip] ***NO_CI*** Add @hcho3 as maintainer

[hcho3]

I would like to add myself as a maintainer of this recipe. I have been an active maintainer of the dmlc-core package since 2018, and I would like to make time to better maintain the Conda package.

Here is the work I anticipate doing in the near future:

• Update XGBoost and Treelite recipes to use the dmlc feedstock. This will require updating XGBoost and Treelite to work with the version of dmlc-core given by the feedstock. I am a maintainer for both packages.
• Possibly add Windows build for dmlc-core.
• Ensure that the dmlc feedstock is up-to-date. I will put tags on dmlc-core as necessary.

[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.

[hcho3]

@conda-forge-admin , please rerender

[hcho3]

@conda-forge-admin, please rerender