koa deprecated Support for generators will be removed in v3

[StefanoSega]

this code:

const webpackHotMiddleware = require('koa-webpack-hot-middleware');

const compiler = webpack(config[0]);
koaApp.use(webpackHotMiddleware(compiler));

generates this warning with the latest Koa:

koa deprecated Support for generators will be removed in v3. See the documentation for examples of how to convert old middleware https://github.com/koajs/koa/blob/master/docs/migration.md

[DoNaEMan]

you may need koa-convert