fix: make r/demo/wugnot compatible with r/demo/users

[r3v4s]

!!! BREAKING CHANGE: data type for wugnot public function's parameter has been changed

Just like foo20 respects a new p/demo/users, fix wugnot to respect it too.

Related #1433 by @harry-hov

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.49%. Comparing base (728f3f2) to head (1b19af9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1782   +/-   ##
=======================================
  Coverage   47.49%   47.49%           
=======================================
  Files         388      388           
  Lines       61305    61305           
=======================================
  Hits        29117    29117           
  Misses      29750    29750           
  Partials     2438     2438           

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[zivkovicmilos]

Looks good 💯