The extensions option does not work

[fivemru]

Hello!

When I set the extensions option as extensions: ['png'] or empty array extensions: [], the plugin tries to process all image formats.

When:

    new ImageSpritePlugin({
      extensions: ['png'],
    }),

I get an error for jpg file:

 92% additional asset processing imageSpriteWebpackPlugin[image-sprite] ✖ 'url(../images/blocks/header/bg-image.jpg)' skipped. Please use 'background-position' as '0 0'
[image-sprite] ⚠ Shorthand properties preferred : background-image: url('../images/blocks/contacts/map.png')

package.json:

    "webpack": "^4.26.1",
    "image-sprite-webpack-plugin": "^0.2.4",

It would also be very convenient to be able to specify in the option a mask or a regular expression for the files to be processed. For example:

match: ['**/sprite/*.png'],

To process png files only from a specific directory.

Thanks, have a nice day.