"SendMessage" was renamed, documentation needs to be updated

[uvulpos]

client.On("messageCreate", func(msg *discord.Message) {
    if msg.Content == "ping" {
-       client.Channel.Send(msg.ChannelId, "Pong ! 🏓")
+               client.Channel.SendMessage(msg.ChannelId, "Pong ! 🏓")
    }
})

[szerookii]

Indeed the documentation is out of date, this will be corrected before the v1 release.