Bump @rollup/plugin-typescript from 12.1.0 to 12.1.1 (#305)

Bumps [@rollup/plugin-typescript](https://github.com/rollup/plugins/tree/HEAD/packages/typescript) from 12.1.0 to 12.1.1.
- [Changelog](https://github.com/rollup/plugins/blob/master/packages/typescript/CHANGELOG.md)
- [Commits](https://github.com/rollup/plugins/commits/typescript-v12.1.1/packages/typescript)

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

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