Add guild member banners

docs/resources/Guild.md

@@ -347,6 +347,7 @@ A partial [guild](#DOCS_RESOURCES_GUILD/guild-object) object. Represents an Offl
 | user? | [user](#DOCS_RESOURCES_USER/user-object) object | the user this guild member represents |
 | nick? | ?string | this user's guild nickname |
 | avatar? | ?string | the member's [guild avatar hash](#DOCS_REFERENCE/image-formatting) |
+| banner? | ?string | the member's [guild banner hash](#DOCS_REFERENCE/image-formatting) |
 | roles | array of snowflakes | array of [role](#DOCS_TOPICS_PERMISSIONS/role-object) object ids |
 | joined_at | ISO8601 timestamp | when the user joined the guild |
 | premium_since? | ?ISO8601 timestamp | when the user started [boosting](https://support.discord.com/hc/en-us/articles/360028038352-Server-Boosting-) the guild |
@@ -371,6 +372,7 @@ A partial [guild](#DOCS_RESOURCES_GUILD/guild-object) object. Represents an Offl
  "user": {},
  "nick": "NOT API SUPPORT",
  "avatar": null,
+ "banner": null,
  "roles": [],
  "joined_at": "2015-04-26T06:26:56.936000+00:00",
  "deaf": false,

docs/topics/Gateway_Events.md

@@ -714,6 +714,7 @@ Sent when a guild member is updated. This will also fire when the user object of
 | user | a [user](#DOCS_RESOURCES_USER/user-object) object | User |
 | nick? | ?string | Nickname of the user in the guild |
 | avatar | ?string | Member's [guild avatar hash](#DOCS_REFERENCE/image-formatting) |
+| banner | ?string | Member's [guild banner hash](#DOCS_REFERENCE/image-formatting) |
 | joined_at | ?ISO8601 timestamp | When the user joined the guild |
 | premium_since? | ?ISO8601 timestamp | When the user starting [boosting](https://support.discord.com/hc/en-us/articles/360028038352-Server-Boosting-) the guild |
 | deaf? | boolean | Whether the user is deafened in voice channels |