v4.0.0-beta.2 proxy logLevel silent does not work

[jasperkuperus]

• Operating System: macOS
• Node Version: v12.16.2
• NPM Version: 6.14.4
• webpack Version: 5.26.0
• webpack-dev-server Version: 4.0.0-beta.2
• Browser: Chrome

• This is a bug
• This is a modification request

Code

// webpack.config.js
{
  // ...
  devServer: {
    proxy: {
      '/my-path': {
        target: 'http://localhost:1234',
        logLevel: 'silent',
      },
    },
  },
}

Expected Behavior

IF any errors occur in this proxy rule (in my case they sometimes do happen, which is OK), I expect the logLevel: 'silent' to silent them. In the previous version of webpack-dev-server I used (3.11.2), this was in fact the case.

Actual Behavior

Now it ignores the logLevel: 'silent' for the proxy and logs the error:

<e> [webpack-dev-server] [HPM] Error occurred while proxying request localhost:8080/config to http://localhost:1234 [ECONNREFUSED] (https://nodejs.org/api/errors.html#errors_common_system_errors)

The error is correct, but I want it to be silenced, as it was possible in 3.11.2.

For Bugs; How can we reproduce the behavior?

The easiest way to reproduce it, is add a proxy in the devServer section with an invalid target and set logLevel: 'silent'.

[noharashinchan]

I will try to look into it