Migrate useStep and Step to TypeScript

[connor-baer]

Addresses #516.

Purpose

When I started to remove the use of lodash in Circuit UI, I quickly found that it was used heavily in the step component and hook. I took the opportunity to migrate them over to TypeScript.

Approach and changes

• Migrate the useStep hook and Step component to TypeScript. The useStep hook now has the same default options as the Step component (⚠️ technically, this is a breaking change, although it doesn't change the behavior of the hook as far as I can tell)
• Add a missing accessibility label to the Carousel component

Definition of done

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

[vercel]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 42ce33a

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

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[codecov]

Codecov Report

Merging #1505 (42ce33a) into main (2f7537f) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1505   +/-   ##
=======================================
  Coverage   92.33%   92.33%           
=======================================
  Files         201      202    +1     
  Lines        4213     4213           
  Branches     1321     1351   +30     
=======================================
  Hits         3890     3890           
+ Misses        304      303    -1     
- Partials       19       20    +1     

Impacted Files	Coverage Δ
...ackages/circuit-ui/components/Carousel/Carousel.js	100.00% <ø> (ø)
packages/circuit-ui/components/Step/Step.ts	100.00% <100.00%> (ø)
packages/circuit-ui/components/Step/StepService.ts	100.00% <100.00%> (ø)
...ckages/circuit-ui/components/Step/hooks/useStep.ts	100.00% <100.00%> (ø)
packages/circuit-ui/util/helpers.ts	100.00% <100.00%> (ø)
packages/circuit-ui/util/type-check.ts	100.00% <100.00%> (ø)
...es/circuit-ui/components/Pagination/Pagination.tsx	91.42% <0.00%> (ø)

[amelako]

🌟