🐛 missing RRULE prefix for google (#489)

Author: davidruisinger

src/index.spec.ts

@@ -79,7 +79,7 @@ describe("Calendar Links", () => {
       const eTime = dayjs(event.start).add(2, "hour").utc().format(TimeFormats.dateTimeUTC);
       const expectedDates = encodeURIComponent(`${sTime}/${eTime}`);
       expect(link).toBe(
-        `https://calendar.google.com/calendar/render?action=TEMPLATE&dates=${expectedDates}&recur=FREQ%3DYEARLY%3BINTERVAL%3D1&text=Birthday%20party`
+        `https://calendar.google.com/calendar/render?action=TEMPLATE&dates=${expectedDates}&recur=RRULE%3AFREQ%3DYEARLY%3BINTERVAL%3D1&text=Birthday%20party`
       );
     });
 

src/index.ts

@@ -48,7 +48,7 @@ export const google = (calendarEvent: CalendarEvent): string => {
     location: event.location,
     trp: event.busy,
     dates: start + "/" + end,
-    recur: event.rRule,
+    recur: event.rRule ? "RRULE:" + event.rRule : undefined,
   };
   if (event.guests && event.guests.length) {
     details.add = event.guests.join();