Fix android number format

[t1sh0o]

It seems that the currency should be set on the DecimalFormatSymbols instance before setting it to the NumberFormat instance in order to display proper currency.

With the old implementation, we had the following results, from which the first is ok, but the second is wrong:

const bgFormat = new Intl.NumberFormat('bg-BG', {
	style: 'currency',
	currency: 'BGN',
});
const usFormat = new Intl.NumberFormat('en-US', {
	style: 'currency',
	currency: 'BGN',
});
console.log(bgFormat.format(123.9)); // 123,90 лв.
console.log(usFormat.format(123.9)); // $123.90

And with the new one, the second call results in BGN123.90 which seems to be the correct result.

Fixes #23

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[t1sh0o]

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[wendt88]

@NathanWalker can you merge this PR please? thx