backwards compat docs

src/structures/GuildMember.js

@@ -482,7 +482,8 @@ class GuildMember {
 
   /**
    * Ban this guild member
-   * @param {Object} [options] Ban options.
+   * @param {Object|number|string} [options] Ban options. If a number, the number of days to delete messages for, if a
+   * string, the ban reason. Supplying an object allows you to do both.
    * @param {number} [options.days=0] Number of days of messages to delete
    * @param {string} [options.reason] Reason for banning
    * @returns {Promise<GuildMember>}