Add FUNDING metadata

[djc]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.03%. Comparing base (cb99697) to head (e779309).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #222   +/-   ##
=======================================
  Coverage   80.03%   80.03%           
=======================================
  Files           6        6           
  Lines         621      621           
=======================================
  Hits          497      497           
  Misses        124      124           

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