feat(package.json): Update dependency @babel/core to v7.12.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@babel/core (source)	7.12.8 -> 7.12.9

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Release Notes

babel/babel

### [`v7.12.9`](https://togithub.com/babel/babel/blob/master/CHANGELOG.md#v7129-2020-11-24) [Compare Source](https://togithub.com/babel/babel/compare/v7.12.8...v7.12.9) ##### :bug: Bug Fix - `babel-plugin-transform-typescript`, `babel-traverse` - [#​12391](https://togithub.com/babel/babel/pull/12391) Update pathCache in `NodePath#_replaceWith` ([@​JLHwung](https://togithub.com/JLHwung))

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[halfzebra]

:tada: This PR is included in version 5.18.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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