Outreachy remote interships for supporting diversity

**Description of the desired feature**

Something to think about for proactively attracting new contributors - [Outreachy](https://www.outreachy.org/) is a remote internship program for supporting diversity in open source and free software. Similar to [Google Summer of Code](https://summerofcode.withgoogle.com/) but more targeted at under-represented groups.

> Outreachy internships are 3 months long. Interns are paid an internship stipend of $5,500 USD. Interns have a $500 USD travel stipend to attend conferences or events.
>
> Interns work with experienced mentors from open source communities. Outreachy internship projects may include programming, user experience, documentation, illustration, graphical design, data science, project marketing, user advocacy, or community event planning.
>
> Outreachy internships are open to applicants around the world. Interns work remotely. Interns are not required to move.
>
> We expressly invite women (both cis and trans), trans men, and genderqueer people to apply. We also expressly invite applications from residents and nationals of the United States of any gender who are Black/African American, Hispanic/Latinx, Native American/American Indian, Alaska Native, Native Hawaiian, or Pacific Islander.

> Anyone who faces under-representation, systemic bias, or discrimination in the technology industry of their country is invited to apply.

---

### Action points

For community leaders @GenericMappingTools/python: We should try and put in a funding application by Feb 2021 for the mid-2021 round, or Sep 2021 for the end-2021 round (see https://www.outreachy.org/outreachy-december-2020-internship-round/ as a past template). Oh, and someone needs to volunteer to be a mentor :slightly_smiling_face:

For interested intern applicants reading this: Let us know down in this post (or via email/social media) on what you would be interested to work on (e.g. documentation/tutorials/new features/workshops/etc).

---

### Timeline

Important Round Dates | Mid-year Internships | End of year Internships
-- | -- | --
Call for communities and mentored projects opens | January | August
Deadline for new participating communities | February | September
Deadline for submitting new mentored projects | March | October
Initial applications open | late January | late August
Initial applications due | March | October
Contribution period opens | February | September
Final application and contributions due | April | November
Interns announced | April | November
Internships start | May | December
Internships end | August | March

---

Follow up of #672 and inspired by @leouieda's comment in https://github.com/GenericMappingTools/pygmt/issues/677#issuecomment-721534813_.

> > Also need to work on our diversity, let's try and avoid an 'all male' author paper

> Yes! And this takes long term effort on our part. Real effort, not just having the door open but search for people to invite inside. GMT has had an open door for 30 years and that hasn't worked. Same with Numpy. Things only change when we actively push for it.

**Are you willing to help implement and maintain this feature?** Yes, but might need some help with writing the grant application