don't show empty stacks in inventory

src/commands/inventory.ts

@@ -21,7 +21,7 @@ export default {
       .where('user', member.user.id);
 
     // kind of stupid kind of awful
-    const items = (await Promise.all(itemsList.map(async i => ({item: await getItem(i.item), quantity: i.quantity})))).filter(i => i.item);
+    const items = (await Promise.all(itemsList.map(async i => ({item: await getItem(i.item), quantity: i.quantity})))).filter(i => i.item && i.quantity !== 0);
 
     await interaction.followUp(
       `Your inventory:\n${items.length === 0 ? '_Your inventory is empty!_' : items.map(i => `- ${formatItems(i.item!, i.quantity)}\n_${i.item!.description}_`).join('\n')}`