Update babel monorepo to v7.12.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@babel/cli (source)	7.12.7 -> 7.12.8
@babel/core (source)	7.12.7 -> 7.12.8

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Release Notes

babel/babel

### [`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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[coveralls]

Coverage remained the same at 100.0% when pulling b4e9ae80014276cb7915897e38a17ba88dfcb62a on renovate/babel-monorepo into 68ad497a8e17dbfa2527685789e9eb3474762496 on main.

[codecov-io]

Codecov Report

Merging #52 (b4e9ae8) into main (68ad497) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #52   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          102       102           
=========================================
  Hits           102       102           

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