chore(deps): update devdependency @babel/core to ^7.12.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@babel/core (source)	^7.12.7 -> ^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)) ### [`v7.12.8`](https://togithub.com/babel/babel/blob/master/CHANGELOG.md#v7128-2020-11-23) [Compare Source](https://togithub.com/babel/babel/compare/v7.12.7...v7.12.8) ##### :bug: Bug Fix - `babel-traverse` - [#​12390](https://togithub.com/babel/babel/pull/12390) Avoid infinite loops in type inference logic ([@​nicolo-ribaudo](https://togithub.com/nicolo-ribaudo)) - [#​12387](https://togithub.com/babel/babel/pull/12387) Initialize NodePath context when using `getSibling` ([@​nicolo-ribaudo](https://togithub.com/nicolo-ribaudo)) - `babel-cli` - [#​12382](https://togithub.com/babel/babel/pull/12382) Fix Node version check ([@​Hypnosphi](https://togithub.com/Hypnosphi)) ##### :house: Internal - [#​12372](https://togithub.com/babel/babel/pull/12372) chore: fix watch config ([@​JLHwung](https://togithub.com/JLHwung))

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