Bump @rollup/pluginutils from 5.1.1 to 5.1.2 (#749)

Bumps [@rollup/pluginutils](https://github.com/rollup/plugins/tree/HEAD/packages/pluginutils) from 5.1.1 to 5.1.2.
- [Changelog](https://github.com/rollup/plugins/blob/master/packages/pluginutils/CHANGELOG.md)
- [Commits](https://github.com/rollup/plugins/commits/wasm-v5.1.2/packages/pluginutils)

---
updated-dependencies:
- dependency-name: "@rollup/pluginutils"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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