Async initialization for DateFormat

pkg/intl/data/dates/symbols/iw.json

Index: pkg/intl/data/dates/symbols/iw.json
===================================================================
--- pkg/intl/data/dates/symbols/iw.json	(revision 0)
+++ pkg/intl/data/dates/symbols/iw.json	(revision 0)
@@ -0,0 +1 @@
+{"DATEFORMATS":["EEEE, d בMMMM y","d בMMMM y","d בMMM yyyy","dd/MM/yy"],"NARROWWEEKDAYS":["א","ב","ג","ד","ה","ו","ש"],"STANDALONESHORTMONTHS":["ינו׳","פבר׳","מרץ","אפר׳","מאי","יונ׳","יול׳","אוג׳","ספט׳","אוק׳","נוב׳","דצמ׳"],"ERANAMES":["לפני הספירה","לספירה"],"FIRSTWEEKCUTOFFDAY":5,"NARROWMONTHS":["1","2","3","4","5","6","7","8","9","10","11","12"],"STANDALONESHORTWEEKDAYS":["יום א׳","יום ב׳","יום ג׳","יום ד׳","יום ה׳","יום ו׳","שבת"],"FIRSTDAYOFWEEK":6,"STANDALONEWEEKDAYS":["יום ראשון","יום שני","יום שלישי","יום רביעי","יום חמישי","יום שישי","יום שבת"],"WEEKDAYS":["יום ראשון","יום שני","יום שלישי","יום רביעי","יום חמישי","יום שישי","יום שבת"],"QUARTERS":["רבעון 1","רבעון 2","רבעון 3","רבעון 4"],"ERAS":["לפנה״ס","לסה״נ"],"MONTHS":["ינואר","פברואר","מרץ","אפריל","מאי","יוני","יולי","אוגוסט","ספטמבר","אוקטובר","נובמבר","דצמבר"],"TIMEFORMATS":["HH:mm:ss zzzz","HH:mm:ss z","HH:mm:ss","HH:mm"],"SHORTWEEKDAYS":["יום א׳","יום ב׳","יום ג׳","יום ד׳","יום ה׳","יום ו׳","שבת"],"SHORTQUARTERS":["רבעון 1","רבעון 2","רבעון 3","רבעון 4"],"WEEKENDRANGE":[4,5],"STANDALONENARROWWEEKDAYS":["א","ב","ג","ד","ה","ו","ש"],"AVAILABLEFORMATS":null,"NAME":"iw","AMPMS":["לפנה״צ","אחה״צ"],"STANDALONEMONTHS":["ינואר","פברואר","מרץ","אפריל","מאי","יוני","יולי","אוגוסט","ספטמבר","אוקטובר","נובמבר","דצמבר"],"SHORTMONTHS":["ינו","פבר","מרץ","אפר","מאי","יונ","יול","אוג","ספט","אוק","נוב","דצמ"],"STANDALONENARROWMONTHS":["1","2","3","4","5","6","7","8","9","10","11","12"]}