Webpack version got downgraded in 6.3.0

[dmitriy-kudelko]

Hey guys,

Today we saw a bunch of renovate bot PRs in our repos suggesting to upgrade @twilio/flex-plugin and @twilio/flex-plugin-scripts packages from 6.2.3 to 6.3.0 all of which miserably failed on the CI (well, only the ones upgrading @twilio/flex-plugin-scripts strictly speaking).

I started investigating build errors some of which were seemingly related to Webpack being unable to find some modules, and looked at @twilio/flex-plugin-webpack dependencies. And it turned out that webpack version was dropped from 5 to 4.

• https://github.com/twilio/flex-plugin-builder/blob/v6.2.3/packages/flex-plugin-webpack/package.json#L71
• https://github.com/twilio/flex-plugin-builder/blob/v6.3.0/packages/flex-plugin-webpack/package.json#L68

We migrated our repos to webpack 5 a long ago, and didn't expect such a thing to happen at all - that a major version of some dependency (actually lots of dependencies) may drop.

So, my question is how did this happen? :)) But also are you aware of it, and when is it gonna be fixed?
Thanks!

[Jonathan-Dilks-at-Wrisk]

This is extremely confusing, and completely agreed a major dependency downgrade is most unusual and not something I had anticipated. This completely breaks a plugin's webpack.config.js which is of course closely tied to the WebPack major version.