ClassRegistry v5.1.0

[todofixthis]

⚠️ This version contains backwards-incompatible changes. Please review the changelog below for more information. ⚠️

Backwards-incompatible changes

• Dropped support for Python v3.10.
• ClassRegistry no longer derives from collections.abc.Container due to violation of the Liskov Substitution Principle.
  • If this causes issues for your code, please let me know via the issue tracker, and we'll figure out how to resolve it 😺

Other changes

• Added support for Python v3.13.
• [#53] Fixed type scrubbing when decorating a class with @registry.register (thanks @100rab-S for reporting!).
• Added missing type hints.
• ClassRegistry is now PEP-561 compliant.

Maintainer QoL improvements

• Switched to src layout (see src layout vs flat layout for more information).
• Configured Dependabot to also check GitHub actions dependencies.
• Type-checking now runs parallel to unit tests in GitHub Actions.
• Turned on strict mode for mypy checks.
• Updated dev and GitHub Actions dependencies.
  • ⚠️ Note: the "test" dependency group has been renamed to "ci". Wherever you are currently doing poetry install --with=test you will need to change this to poetry install --with=ci.