Support short URL redirects for Omer pages

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hebcal/rest-api",
-  "version": "3.13.1",
+  "version": "3.13.2",
   "author": "Michael J. Radwin (https://github.com/mjradwin)",
   "keywords": [
     "hebcal"
@@ -21,7 +21,7 @@
     "url": "https://github.com/hebcal/hebcal-rest-api/issues"
   },
   "dependencies": {
-    "@hebcal/core": "^3.35.0",
+    "@hebcal/core": "^3.36.2",
     "@hebcal/leyning": "^4.13.2"
   },
   "scripts": {

src/classic-rest-api.spec.js

@@ -1,5 +1,5 @@
 import test from 'ava';
-import {HebrewCalendar, Location, DafYomiEvent, HDate, HebrewDateEvent, MishnaYomiEvent} from '@hebcal/core';
+import {HebrewCalendar, Location, DafYomiEvent, HDate, HebrewDateEvent, MishnaYomiEvent, OmerEvent} from '@hebcal/core';
 import {eventsToClassicApi, eventToClassicApiObject} from './classic-rest-api';
 
 test('eventToClassicApiObject', (t) => {
@@ -465,3 +465,18 @@ test('location-zip', (t) => {
   };
   t.deepEqual(apiResult, expected);
 });
+
+test('omer', (t) => {
+  const ev = new OmerEvent(new HDate(2, 'Sivan', 5770), 46);
+  const obj = eventToClassicApiObject(ev, {}, false);
+  const expected = {
+    title: '46th day of the Omer',
+    date: '2010-05-15',
+    category: 'omer',
+    title_orig: 'Omer 46',
+    hebrew: 'עומר יום 46',
+    link: 'https://hebcal.com/o/5770/46?us=js&um=api',
+    memo: 'Eternity within Majesty\nנֶּֽצַח שֶׁבְּמַּלְכוּת\nNetzach sheb\'Malkhut',
+  };
+  t.deepEqual(obj, expected);
+});

src/common.js

@@ -279,12 +279,15 @@ export function appendIsraelAndTracking(url, il, utmSource, utmMedium, utmCampai
     const path = u.pathname;
     const isHolidays = path.startsWith('/holidays/');
     const isSedrot = path.startsWith('/sedrot/');
-    if (isHolidays || isSedrot) {
+    const isOmer = path.startsWith('/omer/');
+    if (isHolidays || isSedrot || isOmer) {
       u.host = 'hebcal.com';
       if (isHolidays) {
         u.pathname = '/h/' + path.substring(10);
-      } else {
+      } else if (isSedrot) {
         u.pathname = '/s/' + path.substring(8);
+      } else { // isOmer
+        u.pathname = '/o/' + path.substring(6);
       }
       if (!utmCampaign || !(utmCampaign.startsWith('ical-') || utmCampaign.startsWith('pdf-'))) {
         if (utmSource) {