NumberFormatter no longer accepts floats

[Propaganistas]

I've noticed that NumberFormatter underwent some changes from 0.* tot 1.*. More specifically the percent style got some breaking changes. I'm just curious if the following ones are intended.

// version 0.*
$formatter->format(75, ['style' => 'percent']); // 75%

// version 1.*
$formatter->format(75, ['style' => 'percent']); // 7500%

// version 0.*
$formatter->format(0.75, ['style' => 'percent']); // 0.75%

// version 1.*
$formatter->format(0.75, ['style' => 'percent']); // Exception (floats cannot be passed)
$formatter->format('0.75', ['style' => 'percent']); // 75%

[bojanz]

Everything except the Exception was done intentionally to sync the formatter with php's NumberFormatter (which formats percentages the same way). See #67.

The float exception is a regression caused by adding rounding, since rounding always requires a string (bcmath). But we can cast to string before then.

[Propaganistas]

Ok seems legit!
I'd definitely vouch for implementing a quick string cast.