feat(MessageSelectMenu): droppybois (#5692)

Co-authored-by: Antonio Román <kyradiscord@gmail.com>

src/structures/SelectMenuInteraction.js

@@ -0,0 +1,21 @@
+'use strict';
+
+const MessageComponentInteraction = require('./MessageComponentInteraction');
+
+/**
+ * Represents a select menu interaction.
+ * @extends {MessageComponentInteraction}
+ */
+class SelectMenuInteraction extends MessageComponentInteraction {
+  constructor(client, data) {
+    super(client, data);
+
+    /**
+     * The values selected, if the component which was interacted with was a select menu
+     * @type {string[]}
+     */
+    this.values = this.componentType === 'SELECT_MENU' ? data.data.values : null;
+  }
+}
+
+module.exports = SelectMenuInteraction;