fix: Broken menu button setIcon type

[Chocobozzz]

Description

Prevent

Property 'setIcon' in type 'MenuButton' is not assignable to the same property in base type 'Component'.
  Type '(name: string) => void' is not assignable to type '(iconName: string, el?: Element) => Element'.
    Type 'void' is not assignable to type 'Element'.

71     setIcon(name: string): void;

Typescript error

Specific Changes proposed

Fix typings

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
  • Has no DOM changes which impact accessiblilty or trigger warnings (e.g. Chrome issues tab)
  • Has no changes to JSDoc which cause npm run docs:api to error
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.31%. Comparing base (d203eab) to head (a05efef).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9089   +/-   ##
=======================================
  Coverage   84.31%   84.31%           
=======================================
  Files         120      120           
  Lines        8154     8154           
  Branches     1964     1964           
=======================================
  Hits         6875     6875           
  Misses       1279     1279           

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[amtins]

LGTM