chore(deps): bump core-js from 3.11.2 to 3.12.0 (#432)

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.11.2 to 3.12.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.12.0/packages/core-js)

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