"jQuery is not defined" after require/import when use ES6 with Webpack 4

I am using Webpack 4 for the build process of my React app. My app uses jQuery and I want to import jQuery plugin but get the following error:

Failed to compile.

./jquery-plugin.js
  Line 3:  'jQuery' is not defined  no-undef

I've tried the methods described here and here but neither helped me.

// app.js

import $ from 'jquery';
// import './jquery-plugin.js';
window.$ = window.jQuery = $;

require('./jquery-plugin.js');

// jquery-plugin.js

(function($) {
  // Plugin code
})(jQuery);

If I understand this approach works correctly in the previous Webpack versions.

If I add import jQuery from 'jquery' to jquery-plugin.js for test it works fine but I cannot do this since it is 3rd party plugin.

Does anyone have ideas how to make jQuery visible globally in Webpack 4?

UPD:

I use react-app-rewired for override Webpack config. Here is my config:

// config-overrides.js

const webpack = require('webpack');

module.exports = function override(config, env) {
  //do stuff with the webpack config...

  config.module.rules.push({
    // Exposes jQuery for use outside Webpack build
    test: require.resolve('jquery'),
    use: [{
      loader: 'expose-loader',
      options: 'jQuery'
    },{
      loader: 'expose-loader',
      options: '$'
    }]
  });

  config.plugins.push(
    new webpack.ProvidePlugin({
    //provide jquery in all the ways 3rd party plugins might look for it (note that window.$/window.jQuery will not actually set it on the window, which is cool)
    '$': 'jquery',
    'jQuery': 'jquery',
    'window.jQuery': 'jquery',
    'window.$': 'jquery'
  }));

  config.resolve = {
    alias: {
      'jquery-ui': 'jquery-ui-dist/jquery-ui.js'
    },
  };

  return config;
};