fixing memory leak

bot.js

@@ -31,9 +31,10 @@ async function postFeed() {
     `accounts/${process.env.MASTODON_ACCOUNT_ID}/statuses`,
     {}
   );
-  var postDate = new Date(timeline.data[0].created_at);
+  let postDate = new Date(timeline.data[0].created_at);
 
   let count = 0;
+  await Promise.all(
     feed.items.every(async (item) => {
       let pubDate = new Date(item.pubDate);
 
@@ -49,5 +50,8 @@ async function postFeed() {
       }
 
       return true;
-  });
+    })
+  );
+
+  return true;
 }