chore: release v0.5.5

[sumup-bot]

🤖 New release

• sumup: 0.5.4 -> 0.5.5

Changelog

0.5.5 - 2025-12-19

Added

• release 0.5.6 (#65)
• (sdk) improve typing of enums
• (examples) make oauth2 example runnable (#40)
• (examples) update oauth2 example (#37)

Fixed

• release process
• set version to 0.5.4
• version
• reader status call response
• better handle string capitalization (#53)

Other

• release v0.5.5 (#67)
• release v0.5.5 (#66)
• synced file(s) with sumup/apis (#63)
• synced file(s) with sumup/apis (#55)
• (deps) bump uuid from 1.18.1 to 1.19.0 (#59)
• synced file(s) with sumup/apis (#54)
• release v0.5.5 (#38)
• synced file(s) with sumup/apis (#50)
• (tooling) update dependabot config
• synced file(s) with sumup/apis (#43)
• (examples) rename card reader checkout example (#44)
• synced file(s) with sumup/apis (#39)

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This PR was generated with release-plz.