v5.0.0

This version updates webpack-hot-client to the latest version.

Breaking Changes

webpack-hot-client@4.0.0 contains many breaking changes. The breaking changes here follow those changes.

• dev option now named devMiddleware
• hot option now named hotClient
• The result from calling the default koa-webpack export now returns a Promise
  e.g.

  koaWebpack({ ... opts ... })
   .then((middleware) => {
    app.use(middleware);
  });