message: postcss loader also support
  .postcssrc.json and .postcssrc.yml
  which is recommended to use  extensions
diff: @@ -2118,7 +2118,7 @@ export const extensions: IFileCollection = {
  },
  {
  icon: 'postcssconfig',
  - extensions: ['.postcssrc', '.postcssrc.js', 'postcss.config.js'],
  + extensions: ['.postcssrc', '.postcssrc.json', '.postcssrc.yml', '.postcssrc.js', 'postcss.config.js'],
  filename: true,
  format: FileFormat.svg,
  },
  