Create FUNDING.yml

[zbeekman]

Summary of changes

Add funding button

Rationale for changes

Help users donate

Additional info and certifications

This pull request (PR) is a:

• Bug fix
• Feature addition
• Other, Please describe: shameless solicitation for money

I certify that

• I certify that:
  • I have reviewed and followed the [contributing guidelines]
  • I will wait at least 24 hours before self-approving the PR to give another
    OpenCoarrays developer a chance to review my proposed code
  • I have not introduced errant white space (no trailing white space or white space errors may
    be introduced)
  • I have added an explanation of what these changes do and why they should be included
  • I have checked to ensure there aren't other open Pull Requests for the same change
  • I have you written new tests for these changes
  • I have successfully tested these changes locally
  • I have commented any non-trivial, non-obvious code changes
  • The commits are logically atomic, self consistent and coherent
  • The commit messages follow best practices
  • Test coverage is maintained or increased after this is merged

Code coverage data

[zbeekman]

LGTM

[codecov]

Codecov Report

Merging #670 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #670   +/-   ##
=======================================
  Coverage   54.54%   54.54%           
=======================================
  Files           3        3           
  Lines        2924     2924           
=======================================
  Hits         1595     1595           
  Misses       1329     1329