Use modularized imports from @hebcal/core

Author: mjradwin

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@hebcal/icalendar",
-  "version": "6.3.2",
+  "version": "6.3.3",
   "author": "Michael J. Radwin (https://github.com/mjradwin)",
   "keywords": [
     "ical",

package.json

@@ -8,13 +8,6 @@ module.exports = [
     input: 'src/icalendar.ts',
     output: [{file: pkg.module, format: 'es', name: pkg.name, banner}],
     plugins: [typescript()],
-    external: [
-      '@hebcal/hdate',
-      '@hebcal/core',
-      /@hebcal\/rest-api/,
-      'fs',
-      'stream',
-      'murmurhash3',
-    ],
+    external: [/@hebcal\//, 'fs', 'stream', 'murmurhash3'],
   },
 ];

rollup.config.cjs

@@ -1,6 +1,9 @@
-import {Locale, greg, flags, CalOptions, Event, OmerEvent} from '@hebcal/core';
+import {Event, flags} from '@hebcal/core/dist/esm/event';
+import {CalOptions} from '@hebcal/core/dist/esm/CalOptions';
+import {Locale} from '@hebcal/core/dist/esm/locale';
+import {OmerEvent} from '@hebcal/core/dist/esm/omer';
 import {murmur32HexSync} from 'murmurhash3';
-import {pad2, pad4} from '@hebcal/hdate';
+import {pad2, pad4, isDate} from '@hebcal/hdate';
 import {
   getCalendarTitle,
   getEventCategories,
@@ -211,7 +214,7 @@ export class IcalEvent {
       return 'TRIGGER:' + evAlarm;
     } else if (typeof evAlarm === 'boolean' && !evAlarm) {
       return null;
-    } else if (greg.isDate(evAlarm)) {
+    } else if (isDate(evAlarm)) {
       const alarmDt = evAlarm as Date;
       alarmDt.setSeconds(0);
       return 'TRIGGER;VALUE=DATE-TIME:' + IcalEvent.makeDtstamp(alarmDt);