chore(deps): bump thiserror to version 2.x; no migration necessary

[LeoniePhiline]

#14 - Bump thiserror to v2

Fixes #14

Description

thiserror 2.0 has been released.

Upstream release: https://github.com/dtolnay/thiserror/releases/tag/2.0.0

This changeset bumps the dependency to "^2".

No other changes are necessary.

Type of change

Please select relevant options.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the contribution guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I formatted the code with cargo fmt
• I checked my code using cargo clippy and reports no warnings
• I have added tests that prove my fix is effective or that my feature works
• The changes I've made are Windows, MacOS, Linux compatible (or I've handled them using cfg target_os)
• I increased or maintained the code coverage for the project, compared to the previous commit

Acceptance tests

wait for a project maintainer to fulfill this section...

• regression test: ...

[LeoniePhiline]

CI is failing - but that has nothing to do with this MR.

main needs:

• some clippy fixes
  • [BUG] - Clippy fails #16
• migration for -Zprofile
  • [BUG] - actions-rs/cargo is unmaintained and must be replaced #17

[LeoniePhiline]

@veeso CI should succeed now, since 09e3979 has been pushed to main.

Could you please rerun CI for this PR?

It should then be mergeable straight away.