Bump myclabs/deep-copy in the development-dependencies group

Bumps the development-dependencies group with 1 update: [myclabs/deep-copy](https://github.com/myclabs/DeepCopy).


Updates `myclabs/deep-copy` from 1.11.1 to 1.12.0
- [Release notes](https://github.com/myclabs/DeepCopy/releases)
- [Commits](myclabs/DeepCopy@1.11.1...1.12.0)

---
updated-dependencies:
- dependency-name: myclabs/deep-copy
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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