Allow users to turn off leave messages.

Xiao.js

@@ -50,6 +50,7 @@ client.on('ready', () => {
 client.on('guildMemberRemove', async member => {
 	const channel = member.guild.systemChannel;
 	if (!channel || !channel.permissionsFor(client.user).has('SEND_MESSAGES')) return null;
+	if (channel.topic && channel.topic.includes('<xiao:disable-leave>')) return null;
 	try {
 		await channel.send(`**${member.user.tag}** bailed on us...`);
 		return null;

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "xiao",
-	"version": "105.2.0",
+	"version": "105.2.1",
 	"description": "Your personal server companion.",
 	"main": "Xiao.js",
 	"scripts": {
@@ -38,7 +38,7 @@
 		"discord.js": "github:discordjs/discord.js",
 		"discord.js-commando": "github:discordjs/Commando",
 		"dotenv": "^8.0.0",
-		"mathjs": "^5.10.0",
+		"mathjs": "^5.10.3",
 		"moment": "^2.24.0",
 		"moment-duration-format": "^2.2.2",
 		"moment-timezone": "^0.5.25",