fix: add conditional for minutes calculation so that minutes still pr…

…operly shows as :59 until hour is increased by one

index.js

@@ -32,7 +32,12 @@ const toHHMM = (input) => {
     const sign = total < 0 ? '-' : '';
     total = Math.abs(total);
     const hours = Math.floor(total / 60);
-    const minutes = Math.round(total) % 60;
+    let minutes = total % 60;
+    if (minutes >= 59.5 && minutes <= 60) {
+        minutes = Math.floor(minutes);
+    } else {
+        minutes = Math.round(minutes);
+    }
     const paddedMinutes = minutes.toString().padStart(2, '0');
     return `${sign}${hours}:${paddedMinutes}`;
 };