Added Guild.fetchBans()

src/structures/Guild.js

@@ -552,6 +552,14 @@ class Guild {
     return this.client.rest.methods.unbanGuildMember(this, member);
   }
 
+  /**
+   * Fetch a Collection of banned users in this Guild.
+   * @returns {Promise<String, User>}
+   */
+  fetchBans() {
+    return this.client.rest.methods.getGuildBans(this);
+  }
+
   /**
    * Gets the URL to this guild's icon (if it has one, otherwise it returns null)
    * @type {?String}