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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[coveralls]

Coverage remained the same at 100.0% when pulling 057b128d72e0cb873585843a37fd4f8e23ac60ba on renovate/babel-monorepo into 12a0af78d7358cb579eb19ebcce1ceb79713928c on main.

[codecov-io]

Codecov Report

Merging #53 (057b128) into main (12a0af7) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #53   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          102       102           
=========================================
  Hits           102       102           

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