webpack-dev-server and webpack-chain conflict?

[SOMGER]

Hi, I recently updated to version vue/cli@5.0.8 and what I found that there is a conflict in webpack-chain's API for chainWebpack used in vue.config.js, as the webpack-chain (6.51) package supports webpack4 only and the webpack-dev-server 4, plus many other packages, require webpack 5 which includes breaking chainges. For instance, chainWebpack: (config){...
config.devServer.public("http://localhost:8080")
}
will throw an error saying public is not a valid devServer option, and was replaced to client.webSocketURL, but then there is no client option in webpack-chain.

webpack dev server would support webpack 4.47, but many other packages in the update have ^5.0 as a webpack dependency. Is there a way to resolve this conflict without downgrading to vue/cli@4.5.19?