Widen SelectorGroup's icon prop type

[connor-baer]

Improves #2238.

Purpose

#2238 added support for icons inside SelectorGroup options. Currently, the prop type only allows icons from @sumup/icons, but small images or illustrations should be supported as well.

Approach and changes

• Widen the prop type for the SelectorGroup's icon prop

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests
• Meets minimum browser support
• Meets accessibility requirements

[changeset-bot]

🦋 Changeset detected

Latest commit: fc7f12d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sumup/circuit-ui	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
oss-circuit-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 6, 2023 9:53am

[codecov]

Codecov Report

Merging #2239 (fc7f12d) into main (de7489b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2239   +/-   ##
=======================================
  Coverage   97.04%   97.04%           
=======================================
  Files         251      251           
  Lines       19806    19806           
  Branches     1208     1208           
=======================================
  Hits        19220    19220           
  Misses        566      566           
  Partials       20       20           

Files Changed	Coverage Δ
...ckages/circuit-ui/components/Selector/Selector.tsx	96.90% <100.00%> (ø)