chore: add funding to package.json

[bjohansebas]

Ref: expressjs/discussions#356

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.82%. Comparing base (26d87a2) to head (d69c972).
Report is 27 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##            master     #388      +/-   ##
===========================================
- Coverage   100.00%   97.82%   -2.18%     
===========================================
  Files            1        1              
  Lines          668      367     -301     
  Branches       151      128      -23     
===========================================
- Hits           668      359     -309     
- Misses           0        8       +8     

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[UlisesGascon]

The CI issues are not related to this pr, so I will merge it 👍