Add Intl.DateTimeFormat support for all languages and calendars

[hashemisa]

Currently only the Gregorian calendar is available!

new Intl.DateTimeFormat([locales[, options]])

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat/DateTimeFormat

[alisabzevari]

This should be solved by #1968.

[kishiguro]

Yes, Deno with ICU version works as expected.

$ ~/rust/deno/target/debug master* deno
Deno 1.0.2
exit using ctrl+d or close()
> const date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
undefined
> console.log(new Intl.DateTimeFormat('en-US').format(date));
12/20/2012
undefined
> console.log(new Intl.DateTimeFormat('en-GB').format(date));
20/12/2012
undefined
> console.log(new Intl.DateTimeFormat(['ban', 'id']).format(date));
20/12/2012
undefined

[hashemisa]

Node.js supports this possibility

[ry]

duplicate of #1968