replace gmt with utc

Author: PeronGH

date.ts

@@ -1,4 +1,4 @@
-export type Zone = "local" | "gmt";
+export type Zone = "local" | "utc";
 
 export const short_utc = (utc_ts: number) =>{
   const utc = new Date(utc_ts),

main.test.ts

@@ -10,14 +10,14 @@ Deno.test('UTC event',
       beginDate: [2022, 8, 1, 10, 10],
       endDate: [2022, 8, 1, 11, 10],
       desc: 'Hello',
-      zone: 'gmt' // Universal time required
+      zone: 'utc' // Universal time required
     };
     const evt = new Event(cfg);
     const lines = evt.toLines()
     assertEquals(lines[0][0], "BEGIN")
     assertEquals(lines[0][1], "VEVENT")
 
-    // Note 'Z' suffix for GMT (precaution against daylight saving time surprises)
+    // Note 'Z' suffix for UTC (precaution against daylight saving time surprises)
     assertEquals(lines[3], ["DTSTART", "20220801T101000Z"])
     assertEquals(lines[4], ["DTEND", "20220801T111000Z"]) 
 

main.ts

@@ -54,7 +54,7 @@ export class Event {
     const result = [
       eventBegin,
       ['UID', uid],
-      ['DTSTAMP', parseDate(new Date(), "gmt")],
+      ['DTSTAMP', parseDate(new Date(), "utc")],
       ['DTSTART', parseDate(this.config.beginDate, this.zone)],
       ['DTEND', parseDate(this.config.endDate!, this.zone)],
       ['SUMMARY', title],