fix(v2): align installed core-js version with babel config

[armano2]

Motivation

Remove dead or unnecessary dependencies, currently for unknown reason docosaurus requires core-js@2 and babel is configured to use core-js@3, this was not a big issue for end customer as core-js@3 is installed as dependency of dependency, but its still an issue

docusaurus/packages/docusaurus/src/babel/preset.ts

Lines 30 to 32 in 9a6d6a9

	useBuiltIns: 'entry',
	loose: true,
	corejs: '3',

Have you read the Contributing Guidelines on pull requests?

yes

Related PRs

#3055

[netlify]

[V1] Deploy preview failure

Built without sensitive environment variables with commit 2d39af7

https://app.netlify.com/sites/docusaurus-1/deploys/6046f9ef0d0d360007502f95

[armano2]

netlify failed due to some unrelated issue:

5:33:16 AM: $ cd .. && crowdin download -b master --config crowdin-v1.yml
5:33:16 AM: ❌ Configuration file is invalid. Check the following parameters in your configuration file:
5:33:16 AM: 	- Required option 'api_token' is missing in the configuration file

[netlify]

Deploy preview for docusaurus-2 ready!

Built without sensitive environment variables with commit 2d39af7

https://deploy-preview-4366--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟢 Performance	92
🟢 Accessibility	96
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-4366--docusaurus-2.netlify.app/classic/

[slorber]

thanks, make sense