Real-Time Phoenix - 'wscat' not working on page 32

@sb8244

Hi, I wasn’t able to get wscat working with the code presented in the book. For example, I needed to perform the following to determine what code was needed for Phoenix 1.6:

mix phx.gen.socket User
mix phx.gen.channel Ping

Are there plans to update the PDF/ePub and associated code bundle to support Phoenix 1.6?