Forward refs to notification components

[connor-baer]

Fixes #1828.

Purpose

As a rule all components should forward refs to either the wrapping element (for patterns like notifications) or to the core HTML element (such as the input for inputs).

– @robinmetral in #1828 (comment)

Approach and changes

• Forward refs to the NotificationBanner, NotificationFullscreen, and NotificationInline components

I didn't add refs to the NotificationModal and NotificationToast components since those aren't rendered directly by developers.

Definition of done

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

[changeset-bot]

🦋 Changeset detected

Latest commit: dbab04f

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	Minor

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Name	Status	Preview	Comments	Updated
oss-circuit-ui	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 20, 2023 at 9:33AM (UTC)

[codecov]

Codecov Report

Merging #2007 (dbab04f) into main (7a71094) will increase coverage by 0.00%.
The diff coverage is 87.50%.

@@           Coverage Diff           @@
##             main    #2007   +/-   ##
=======================================
  Coverage   91.95%   91.95%           
=======================================
  Files         170      170           
  Lines        3541     3543    +2     
  Branches     1176     1176           
=======================================
+ Hits         3256     3258    +2     
  Misses        265      265           
  Partials       20       20           

Impacted Files	Coverage Δ
...mponents/NotificationBanner/NotificationBanner.tsx	83.87% <84.61%> (+0.26%)	⬆️
...mponents/NotificationInline/NotificationInline.tsx	92.98% <88.88%> (+0.12%)	⬆️
.../NotificationFullscreen/NotificationFullscreen.tsx	100.00% <100.00%> (ø)

[robinmetral]

Thank you!