fix(plugin-netlify-cms): align mini-css-extract-plugin version

[erezrokah]

Description

TLDR: having mismatching versions of mini-css-extract-plugin in Gatsby and the Netlify CMS plugin causes build errors.
In Gatsby v3 this was fixed by aligning the versions, but the fix was not back ported to v2.

This PR ports back the fix to a branch named gatsby-plugin-netlify-cms_v4 which is based on the tag gatsby-plugin-netlify-cms@4.10.0. I believe v4.10.0 is the last non v5 release of the plugin.

To fix the issue for Gatsby v2 users, we'll need to merge this PR and release a new version of the plugin based on the gatsby-plugin-netlify-cms_v4 branch (probably gatsby-plugin-netlify-cms@4.10.1).

Related Issues

Fixes #24577 for Gatsby v2 users per #24577 (comment) and #24577 (comment)

[pieh]

Yeah, it make sense 👍

This PR ports back the fix to a branch named gatsby-plugin-netlify-cms_v4 which is based on the tag gatsby-plugin-netlify-cms@4.10.0. I believe v4.10.0 is the last non v5 release of the plugin.

Can you target release/2.32 branch instead (and possibly cover any lock file adjustments if needed)? I would have to eventually get this change to that branch anyway to make actual release for previous major (just due to our publishing setup with lerna)

[erezrokah]

Can you target release/2.32 branch instead

Sure, changing the base kind of messed with GitHub, but this should be ok now.

[pieh]

Thank you!

[pieh]

gatsby-plugin-netlify-cms@4.10.1 was published

[Morantron]

thanks <3

[jf-home]

This doesn't appear to resolve the issue for me. I'm still getting the following error:

gatsby-plugin-purgecss: Only processing  C:\home\hello-i8n\src\components\all.sass
⠋ Building development bundle
C:\home\hello-i8n\node_modules\yoga-layout-prebuilt\yoga-layout\build\Release\nbind.js:53
        throw ex;
        ^

Error: Callback was already called.
    at throwError (C:\home\hello-i8n\node_modules\neo-async\async.js:16:11)
    at C:\home\hello-i8n\node_modules\neo-async\async.js:2818:7
    at processTicksAndRejections (internal/process/task_queues.js:75:11)

[erezrokah]

Hi @jf-home can you post a reproduction on the issue #24577?
Please share a pubic repo reproducing the error and the result of npm ls gatsby-plugin-netlify-cms or yarn why gatsby-plugin-netlify-cms

[jf-home]

Hi @erezrokah - absolutely - comment added to #24577 as requested.