Silence some code warnings

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hebcal/rest-api",
-  "version": "4.5.6",
+  "version": "4.5.7",
   "author": "Michael J. Radwin (https://github.com/mjradwin)",
   "keywords": [
     "hebcal"

src/common.js

@@ -171,7 +171,7 @@ export function getCalendarTitle(events, options) {
   const location = options.location;
   if (options.yahrzeit) {
     title += ' Yahrzeits and Anniversaries';
-  } else if (location && location.name) {
+  } else if (location?.name) {
     const comma = location.name.indexOf(',');
     const name = (comma == -1) ? location.name : location.name.substring(0, comma);
     title += ' ' + name;
@@ -232,9 +232,7 @@ const HOLIDAY_IGNORE_MASK = flags.DAF_YOMI | flags.OMER_COUNT |
  */
 export function makeTorahMemoText(ev, il) {
   const mask = ev.getFlags();
-  if (mask & HOLIDAY_IGNORE_MASK) {
-    return '';
-  } else if (typeof ev.eventTime !== 'undefined') {
+  if ((mask & HOLIDAY_IGNORE_MASK) || (typeof ev.eventTime !== 'undefined')) {
     return '';
   }
   const reading = (mask & flags.PARSHA_HASHAVUA) ?
@@ -250,12 +248,12 @@ export function makeTorahMemoText(ev, il) {
     }
     if (reading.haftara) {
       memo += 'Haftarah: ' + reading.haftara;
-      if (reading.reason && reading.reason.haftara) {
+      if (reading.reason?.haftara) {
         memo += ' | ' + reading.reason.haftara;
       }
     }
   }
-  if (reading && reading.sephardic) {
+  if (reading?.sephardic) {
     memo += '\nHaftarah for Sephardim: ' + reading.sephardic;
   }
   return memo;

src/rss.js

@@ -65,7 +65,7 @@ export function eventsToRss2(events, options) {
   const utmSource = options.utmSource || 'shabbat1c';
   const utmMedium = options.utmMedium || 'rss';
   const mainUrlEsc = appendIsraelAndTracking(mainUrl,
-      location && location.getIsrael(),
+      location?.getIsrael(),
       utmSource, utmMedium, options.utmCampaign).replace(/&/g, '&');
   const selfUrlEsc = options.selfUrl.replace(/&/g, '&');
   const lang = options.lang || localeToLg[options.locale] || options.locale || 'en-US';
@@ -118,8 +118,8 @@ export function eventToRssItem2(ev, options) {
   const location = options.location;
   const il = location ? location.getIsrael() : false;
   const tzid = location ? location.getTzid() : 'UTC';
-  const utmSource = (options && options.utmSource) || 'shabbat1c';
-  const utmMedium = (options && options.utmMedium) || 'rss';
+  const utmSource = options.utmSource || 'shabbat1c';
+  const utmMedium = options.utmMedium || 'rss';
   const linkGuid = getLinkAndGuid(ev, il, tzid, options.mainUrl, utmSource, utmMedium);
   const link = linkGuid[0];
   const guid = linkGuid[1];