Add warning instead of purgecss messages when rejected: true to make messages show in console

[ElectronicRU]

rejected: true flag is supposed to provide developer feedback, showing the rejected classes at build time. However, the custom message type this plugin is using isn't recognized by anything and is left for the void. Adding the messages as warnings would allow them to show on PostCSS / Webpack + PostCSS console to be reviewed by the developer.

[ivanbacher]

As a workaround you can use postcss-reporter

const purge = purgecss({
      content: ['./src/**/*.html'],
      rejected: true,
      variables: true
    })

    postcssLoader.options.postcssOptions.plugins.push(purge)

    const reporter = postcssRepoter({
      clearMessages: true,
      filter: () => true
    })

    postcssLoader.options.postcssOptions.plugins.push(reporter)

[ElectronicRU]

Thank you! That solves my usecase, perhaps the package could be mentioned in the PostCSS plugin docs?