support year in relative date format

src/cohost-wc.ts

@@ -8,8 +8,15 @@ function formatRelativeTime(date: Date) {
   const secondsPerMinute = 60;
   const minutesPerHour = 60;
   const hoursPerDay = 24;
-  const daysPerMonth = 30; // JS date handling moment
+  const daysPerMonth = 365.2425 / 12; // not how it works!
+  const daysPerYear = 365.2425; // still not how it works!!
   const intervals = {
+    year:
+      millisecondsPerSecond *
+      secondsPerMinute *
+      minutesPerHour *
+      hoursPerDay *
+      daysPerYear,
     month:
       millisecondsPerSecond *
       secondsPerMinute *