Async initialization for DateFormat

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

Index: pkg/intl/data/dates/symbols/sl.json
===================================================================
--- pkg/intl/data/dates/symbols/sl.json	(revision 0)
+++ pkg/intl/data/dates/symbols/sl.json	(revision 0)
@@ -0,0 +1 @@
+{"DATEFORMATS":["EEEE, dd. MMMM y","dd. MMMM y","d. MMM yyyy","d. MM. yy"],"NARROWWEEKDAYS":["n","p","t","s","č","p","s"],"STANDALONESHORTMONTHS":["jan","feb","mar","apr","maj","jun","jul","avg","sep","okt","nov","dec"],"ERANAMES":["pred našim štetjem","naše štetje"],"FIRSTWEEKCUTOFFDAY":6,"NARROWMONTHS":["j","f","m","a","m","j","j","a","s","o","n","d"],"STANDALONESHORTWEEKDAYS":["ned","pon","tor","sre","čet","pet","sob"],"FIRSTDAYOFWEEK":0,"STANDALONEWEEKDAYS":["nedelja","ponedeljek","torek","sreda","četrtek","petek","sobota"],"WEEKDAYS":["nedelja","ponedeljek","torek","sreda","četrtek","petek","sobota"],"QUARTERS":["1. četrtletje","2. četrtletje","3. četrtletje","4. četrtletje"],"ERAS":["pr. n. št.","po Kr."],"MONTHS":["januar","februar","marec","april","maj","junij","julij","avgust","september","oktober","november","december"],"TIMEFORMATS":["HH:mm:ss zzzz","HH:mm:ss z","HH:mm:ss","HH:mm"],"SHORTWEEKDAYS":["ned.","pon.","tor.","sre.","čet.","pet.","sob."],"SHORTQUARTERS":["Q1","Q2","Q3","Q4"],"WEEKENDRANGE":[5,6],"STANDALONENARROWWEEKDAYS":["n","p","t","s","č","p","s"],"AVAILABLEFORMATS":null,"NAME":"sl","AMPMS":["dop.","pop."],"STANDALONEMONTHS":["januar","februar","marec","april","maj","junij","julij","avgust","september","oktober","november","december"],"SHORTMONTHS":["jan.","feb.","mar.","apr.","maj","jun.","jul.","avg.","sep.","okt.","nov.","dec."],"STANDALONENARROWMONTHS":["j","f","m","a","m","j","j","a","s","o","n","d"]}