Bump iced from 0.10.0 to 0.12.1

Bumps [iced](https://github.com/iced-rs/iced) from 0.10.0 to 0.12.1.
- [Release notes](https://github.com/iced-rs/iced/releases)
- [Changelog](https://github.com/iced-rs/iced/blob/master/CHANGELOG.md)
- [Commits](iced-rs/iced@0.10.0...0.12.1)

---
updated-dependencies:
- dependency-name: iced
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>