Bump copy-webpack-plugin from 12.0.2 to 13.0.0 (#22)

Bumps [copy-webpack-plugin](https://github.com/webpack-contrib/copy-webpack-plugin) from 12.0.2 to 13.0.0.
- [Release notes](https://github.com/webpack-contrib/copy-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/copy-webpack-plugin@v12.0.2...v13.0.0)

---
updated-dependencies:
- dependency-name: copy-webpack-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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