Fix setting guild role positions (#751)

src/client/actions/GuildRolesPositionUpdate.js

@@ -0,0 +1,30 @@
+const Action = require('./Action');
+
+class GuildRolesPositionUpdate extends Action {
+  handle(data) {
+    const client = this.client;
+
+    const guild = client.guilds.get(data.guild_id);
+    if (guild) {
+      for (const partialRole of data.roles) {
+        const role = guild.roles.get(partialRole.id);
+        if (role) {
+          role.position = partialRole.position;
+        }
+      }
+    }
+
+    return {
+      guild,
+    };
+  }
+}
+
+/**
+ * Emitted whenever a guild role is created.
+ * @event Client#guildRoleCreate
+ * @param {Guild} guild The guild that the role was created in.
+ * @param {Role} role The role that was created.
+ */
+
+module.exports = GuildRolesPositionUpdate;