DisTube

• play(), playSkip() now throw error encountered to customize the log instead of console.error().
• Add DisTubeOptions#highWaterMark option to customize ytdl's highWaterMark.
• Add Queue#initMessage
• Update ytsr to 0.1.18
• Leaving voice channel if it's empty after 60s andDisTubeOptions#leaveOnEmpty is true
• Fix minor bug