Add min-width for partial Rating Icons

[bwatry]

In Rating.jsx, if the rating value is a decimal and disablePartialFill is left as false, the rendered partial star looks like a reduced-size full icon instead of a partial icon.

The fix I used was to specify a min-width value on .ss__icon to match the width value.

min-width: fit-content; is probably a better solution, though, as it allows for the possibility that devs might override the default width and height values. Or whatever solution seems best to resolve the issue.

[korgon]

Thank you for reporting the issue!