chore(deps): update panic-semihosting requirement from 0.5.0 to 0.6.0 (#3)

Updates the requirements on [panic-semihosting](https://github.com/rust-embedded/cortex-m) to permit the latest version.
- [Release notes](https://github.com/rust-embedded/cortex-m/releases)
- [Changelog](https://github.com/rust-embedded/cortex-m/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-embedded/cortex-m/compare/v0.5.0...v0.6.0

)

---
updated-dependencies:
- dependency-name: panic-semihosting
  dependency-type: direct:production
...

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