Update toolings and dependencies in yoastseo package

[FAMarfuaty]

Context

Summary

This PR can be summarized in the following changelog entry:

• Updates the toolings in yoastseo package.
• [yoastseo] Updates the dependencies, improves the configuration and cleans up old code.
• [shopify-seo] Updates the toolings in yoastseo package.
• [search-metadata-previews] Ignores import/no-unresolved ESLint rule when importing from yoastseo package.

Relevant technical choices:

• Modified the ESLint config files in some packages so that the GH action LintJS pass:
  • The ESLint configuration specific to yoastseo package was moved to the .eslintrc.js inside the package
  • Adjusted the ESLint config inside @yoast/wordpress-seo and @yoast/search-metadata-previews package so that we ignore import/no-unresolved rule when importing from yoastseo package
• Simplified and updated babel configuration
• Updated and improved the ESLint configuration and Jest configuration
• Upgraded the dependencies. For more detailed documentation, refer to the following page.
• Updated the scripts so that we don't use grunt anymore, except for retrieving the premium configuration which will be tackled in a separate PR in the future

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

For acceptance testing for the developer

• Make sure that all tests pass in Free branch when running yarn test
• Make sure that no errors in the linting when running yarn lint
• Make sure that all tests in add-ons pass after requiring the Free branch

Test in Free

• Install and activate Yoast SEO (or build the plugin)
• Smoke test the analysis and make sure that:
  • there is no error anywhere including in the console
  • the analysis still works

Test in the add-ons (Premium, Local SEO, Video SEO, WooCommerce SEO, News SEO)

• Install and activate the add-ons
  • When building the add-ons, build from trunk and make sure to run composer require command
  • Test together with this premium PR: https://github.com/Yoast/wordpress-seo-premium/pull/4225
• Smoke test the add-ons functionality and make sure that:
  • there is no error anywhere including in the console
  • the analysis still works

Test in Shopify

• Smoke test the analysis in Shopify and make sure that it still works and there is no error in the console

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Block/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

• No further impact other than what's included in the testing instruction above.

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change.
  • Please refer to this page for the documentation of this change.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes #

[coveralls]

Pull Request Test Coverage Report for Build 7a2ab1b4f91c508c2ff4a90ffffb29ba5b83d461

Details

• 78 of 78 (100.0%) changed or added relevant lines in 18 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.6%) to 54.786%

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Totals
Change from base Build 6d81e2d8cec02f54e26aa74dd6da4226d6355b18:	0.6%
Covered Lines:	30043
Relevant Lines:	55078

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💛 - Coveralls