Add a number parser for parsing numbers using non-latin numerals

[kevinbarabash]

Some languages use different numerals, e.g. Eastern Arabic numerals and Georgian numerals (amongst others). It would be nice to have some way to parse these built into the browser.

[Yaffle]

You can use html for this : <input type="number" value="ჩ" lang="en-u-nu-geor" /> - in Firefox the value property will return the number somehow.
Why cannot this be done in JavaScript? It is not difficult to do the conversion for all decimal numbers.

[ryzokuken]

Localized string parsing is a non-goal for ECMA-402. For more, see #1 and https://blog.sffc.xyz/post/190943794505/why-you-should-not-parse-localized-strings.

[sffc]

This makes sense within the scope of a unicode properties API.

Closing this issue in favor of #90.