Async initialization for DateFormat

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

Index: pkg/intl/data/dates/symbols/fr.json
===================================================================
--- pkg/intl/data/dates/symbols/fr.json	(revision 0)
+++ pkg/intl/data/dates/symbols/fr.json	(revision 0)
@@ -0,0 +1 @@
+{"DATEFORMATS":["EEEE d MMMM y","d MMMM y","d MMM y","dd/MM/yy"],"NARROWWEEKDAYS":["D","L","M","M","J","V","S"],"STANDALONESHORTMONTHS":["janv.","févr.","mars","avr.","mai","juin","juil.","août","sept.","oct.","nov.","déc."],"ERANAMES":["avant Jésus-Christ","après Jésus-Christ"],"FIRSTWEEKCUTOFFDAY":3,"NARROWMONTHS":["J","F","M","A","M","J","J","A","S","O","N","D"],"STANDALONESHORTWEEKDAYS":["dim.","lun.","mar.","mer.","jeu.","ven.","sam."],"FIRSTDAYOFWEEK":0,"STANDALONEWEEKDAYS":["dimanche","lundi","mardi","mercredi","jeudi","vendredi","samedi"],"WEEKDAYS":["dimanche","lundi","mardi","mercredi","jeudi","vendredi","samedi"],"QUARTERS":["1er trimestre","2e trimestre","3e trimestre","4e trimestre"],"ERAS":["av. J.-C.","ap. J.-C."],"MONTHS":["janvier","février","mars","avril","mai","juin","juillet","août","septembre","octobre","novembre","décembre"],"TIMEFORMATS":["HH:mm:ss zzzz","HH:mm:ss z","HH:mm:ss","HH:mm"],"SHORTWEEKDAYS":["dim.","lun.","mar.","mer.","jeu.","ven.","sam."],"SHORTQUARTERS":["T1","T2","T3","T4"],"WEEKENDRANGE":[5,6],"STANDALONENARROWWEEKDAYS":["D","L","M","M","J","V","S"],"AVAILABLEFORMATS":null,"NAME":"fr","AMPMS":["AM","PM"],"STANDALONEMONTHS":["janvier","février","mars","avril","mai","juin","juillet","août","septembre","octobre","novembre","décembre"],"SHORTMONTHS":["janv.","févr.","mars","avr.","mai","juin","juil.","août","sept.","oct.","nov.","déc."],"STANDALONENARROWMONTHS":["J","F","M","A","M","J","J","A","S","O","N","D"]}