Bumps [github.com/mitchellh/copystructure](https://github.com/mitchellh/copystructure) from 1.0.0 to 1.2.0.
- [Release notes](https://github.com/mitchellh/copystructure/releases)
- [Commits](https://github.com/mitchellh/copystructure/compare/v1.0.0...v1.2.0

)

---
updated-dependencies:
- dependency-name: github.com/mitchellh/copystructure
  dependency-type: direct:production
  update-type: version-update:semver-minor
...
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