Refactor webpack plugins and add tooling versions file

[enricobattocchi]

• Removed CaseSensitivePathsPlugin from webpack configuration.
• Introduced VERSIONS.json to document versions of tooling and languages.
• Updated yarn.lock with dependency changes.

Context

Summary

This PR can be summarized in the following changelog entry:

• Upgrades dependencies, refactors webpack plugins, sets Node version to 20 and adds tooling versions file.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

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 (Default Block/Gutenberg/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:

UI changes

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

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities
• I have added unittests to verify the code works as intended

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label and noted the work hours.

Fixes #

[Copilot]

Pull request overview

This PR upgrades the project's build tooling by migrating from Babel 6 to Babel 7, updating webpack plugins, and standardizing Node.js to version 20. It introduces a VERSIONS.json file to document versions of tooling and languages used in the project, and removes the CaseSensitivePathsPlugin from the webpack configuration.

Changes:

• Migrated from Babel 6 to Babel 7 with updated presets and plugins
• Removed CaseSensitivePathsPlugin from webpack configuration
• Updated Node.js version from 16 to 20 in .nvmrc
• Added VERSIONS.json to document tooling versions

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Updated dependencies from Babel 6 to Babel 7, upgraded webpack-related packages, and moved @wordpress/data to dependencies
config/webpack/webpack.config.js	Removed CaseSensitivePathsPlugin import and usage, leaving an empty plugins array
VERSIONS.json	Added new configuration file documenting versions of composer, Node.js, PHP, and yarn
.nvmrc	Updated Node.js version from 16 to 20
.babelrc	Simplified Babel configuration by migrating to Babel 7 presets and removing environment-specific test configuration

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.