old_contents: const path = require('path');
  const _ = require('lodash');
  const httpProxy = require('http-proxy-middleware');
  
  const setup = require('setup/setup');
  
  module.exports = function() {
    const browserSync = this.context.browserSync;
  
    const assets = setup.assets;
  
    const browserSyncOpts = setup.plugins.browserSync;
    const proxyOpts = setup.plugins.httpProxyMiddleware;
  
    const plugins = [];
    const middleware = [];
  
    plugins.push({
      module: 'bs-html-injector',
      options: {
        files: [path.join(assets.build, assets.dest.docs)],
      },
    });
  
    _(proxyOpts.proxies).forEach((proxy) => {
      middleware.push(httpProxy(proxy.uri, proxy.options));
    });
  
    browserSyncOpts.plugins = plugins;
    browserSyncOpts.server.middleware = middleware;
    browserSync.init(browserSyncOpts);
  };
  
new_contents: const path = require('path');
  const _ = require('lodash');
  const httpProxy = require('http-proxy-middleware');
  
  const setup = require('setup/setup');
  
  module.exports = function(taskDone) {
    const browserSync = this.context.browserSync;
  
    const assets = setup.assets;
  
    const browserSyncOpts = setup.plugins.browserSync;
    const proxyOpts = setup.plugins.httpProxyMiddleware;
  
    const plugins = [];
    const middleware = [];
  
    plugins.push({
      module: 'bs-html-injector',
      options: {
        files: [path.join(assets.build, assets.dest.docs)],
      },
    });
  
    _(proxyOpts.proxies).forEach((proxy) => {
      middleware.push(httpProxy(proxy.uri, proxy.options));
    });
  
    browserSyncOpts.plugins = plugins;
    browserSyncOpts.server.middleware = middleware;
    browserSync.init(browserSyncOpts);
    taskDone();
  };
  
subject: Add task done callback on BrowserSync task