Fix WS_NOT_OPEN error

[knt2nd]

Here is the error log.

[DEBUG] Error [WS_NOT_OPEN]: Websocket not open to send ...
at /home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/networking/VoiceWebSocket.js:93:68
at new Promise (<anonymous>)
at VoiceWebSocket.send (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/networking/VoiceWebSocket.js:92:12)
at VoiceWebSocket.sendPacket (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/networking/VoiceWebSocket.js:112:17)
at VoiceConnection.setSpeaking (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/VoiceConnection.js:153:8)
at StreamDispatcher._setSpeaking (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/dispatcher/StreamDispatcher.js:303:35)
at StreamDispatcher._sendPacket (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/dispatcher/StreamDispatcher.js:290:10)
at StreamDispatcher._playChunk (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/dispatcher/StreamDispatcher.js:253:10)
at StreamDispatcher._write (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/dispatcher/StreamDispatcher.js:107:10)
at writeOrBuffer (internal/streams/writable.js:358:12) {
[Symbol(code)]: 'WS_NOT_OPEN'
}

It comes from,

https://github.com/discordjs/discord.js/blob/8a7abc9f06d44bf693e35a615bb6ba2c3eb1d6e7/src/client/voice/networking/VoiceWebSocket.js#L90-L99

WebSocket reconnection solves the problem, but why no connection here in the first place. The answer is:

[DEBUG] [WS] closed
[DEBUG] [WS] connect requested
[DEBUG] [WS] reset requested
[DEBUG] [WS] connecting, 5 attempts, wss://japan4233.discord.media/?v=4&encoding=json
[DEBUG] [WS] opened at gateway japan4233.discord.media
...
[DEBUG] [WS] closed
[DEBUG] [WS] connect requested
[DEBUG] [WS] reset requested
[DEBUG] Error [VOICE_CONNECTION_ATTEMPTS_EXCEEDED]: Too many connection attempts (5).
at VoiceWebSocket.connect (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/voice/networking/VoiceWebSocket.js:67:26)
at Timeout._onTimeout (/home/kanata/projects/knt2-dbot/node_modules/discord.js/src/client/BaseClient.js:83:7)
at listOnTimeout (internal/timers.js:554:17)
at processTimers (internal/timers.js:497:7) {
[Symbol(code)]: 'VOICE_CONNECTION_ATTEMPTS_EXCEEDED'
}

When your bot in a voice channel for long time, days or weeks, it encounters the retry limit.

https://github.com/discordjs/discord.js/blob/8a7abc9f06d44bf693e35a615bb6ba2c3eb1d6e7/src/client/voice/networking/VoiceWebSocket.js#L66-L69

It emits the debug event only. I assume that handling at the debug event is a typical bad practice. So, I decided to reset the retry counter every 10 mins. I know it's not a good practice either but I'd say it is better. It should work in most of cases. If it didn't work, it would re-join the voice channel before playing audio.