chore: upgrade redux from 3.7.2 to 4.2.1 across packages

[vraja-pro]

Redux 3.x depends on symbol-observable which conflicts with the Redux DevTools browser extension, causing a Symbol.observable mismatch warning on every store instantiation. Redux 4 drops the symbol-observable dependency, resolving the warnings.

Context

Summary

This PR can be summarized in the following changelog entry:

• Upgrades redux from 3.7.2 to 4.2.1 across packages to remove 10 console warnings.

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:

• Add to wp-config.php

define( ‘SCRIPT_DEBUG’, true );

• Edit a post and check there are no console warnings:

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:

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.
• This PR also affects Yoast SEO for Google Docs. I have added a changelog entry starting with [yoast-doc-extension], added test instructions for Yoast SEO for Google Docs and attached the Google Docs Add-on 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.
• 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.
• I have run grunt build:images and committed the results, if my PR introduces or edits images or SVGs.

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 https://github.com/Yoast/reserved-tasks/issues/1218

[coveralls]

Coverage Report for CI Build 1

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No base build found for commit b17f347 on trunk.
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Coverage: 34.287%

Details

• Patch coverage: No coverable lines changed in this PR.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

Requires a base build to compare against. How to fix this →

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Coverage Stats

Relevant Lines:	16749
Covered Lines:	6124
Line Coverage:	36.56%
Relevant Branches:	10518
Covered Branches:	3225
Branch Coverage:	30.66%
Branches in Coverage %:	Yes
Coverage Strength:	9.1 hits per line

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💛 - Coveralls