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webpack-cli updated to the lattest version is causing issues to laravel-mix (propably)

See original GitHub issue

Laravel Mix Version: 6.0.27
Node Version: 15.8.0
NPM Version: 7.19.0
OS: Linux (Ubuntu 20.04.2 LTS)

Description:

After upgrading this morning the node modules, laravel mix stopped working. This probably has to do with the update of webpack-cli that happened yesterday from version 4.7.2 to 4.8.0.

Steps To Reproduce:

Create a new project with Laravel, install Jetstream (just because it is already configured with inertia) and install the packages (I used yarn, but it’s the same with npm).

And run

#yarn
yarn hot

#npm
npm run hot

and get the following error:

➜ yarn hot
yarn run v1.22.4
$ mix watch --hot

● Mix █████████████████████████  (0%)


[webpack-cli] Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
 - configuration has an unknown property 'webpackbar'. These properties are valid:
   object { bonjour?, client?, compress?, devMiddleware?, firewall?, headers?, historyApiFallback?, host?, hot?, http2?, https?, liveReload?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, public?, setupExitSignals?, static?, transportMode?, watchFiles? }
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.