Setting custom settings in command line is not working

[negabakuru]

When I try to run my application with:
yarn run dev -- --settings="mysettings.json"
I get the following error:

yarn run v0.22.0
$ node build/dev-server.js --settings=mysettings.json

  error: unknown option `--settings'

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

This happens wether my application runs in electron or not.

This is due to webpack not allowing custom arguments without a specific syntax webpack/webpack#2254