Replace abandoned patchwork/utf8 dependency

[Shadow-Devil]

It would be great to replace the patchwork/utf8 dependency since it is abandoned.
It is only used four times in the DC_ProductData file to sort some $options_sorter:

        // Sort by option values
        uksort($options_sorter, array(Utf8::class, 'strnatcasecmp'));

There also exists the strnatcasecmp function directly in PHP, but I am unsure if it works the same for non ASCII characters (and if thats even relevant).

If this can simply be replaced then I can also create a PR for this.

[aschempp]

@leofeyer @ausi any idea what we replaced that with in Contao core?

[leofeyer]

Yes:

See https://github.com/contao/contao/blob/4.13/core-bundle/src/Resources/contao/drivers/DC_Table.php#L5351-L5362

[aschempp]

Fixed in 31bcc53