modify text/voice channels to show extensio from GuildChannel

src/structures/TextChannel.js

@@ -4,6 +4,7 @@ const TextBasedChannel = require('./interface/TextBasedChannel');
 
 /**
  * Represents a Server Text Channel on Discord.
+ * @extends {GuildChannel}
  */
 class TextChannel extends GuildChannel {
 

src/structures/VoiceChannel.js

@@ -3,6 +3,7 @@ const VoiceChannelDataStore = require('./datastore/VoiceChannelDataStore');
 
 /**
  * Represents a Server Voice Channel on Discord.
+ * @extends {GuildChannel}
  */
 class VoiceChannel extends GuildChannel {
   constructor(guild, data) {