fix: ClassKeywordFixer must run before FullyQualifiedStrictTypesFixer

[krzysztofrewak]

Without specified priority, ClassKeywordFixer works bad when combined with FullyQualifiedStrictTypesFixer.

For example this:

<?php

class Whatever
{
    protected string $component = '\Company\Project\Component';
}

Would be transformed into:

<?php

class Whatever
{
    protected string $component = \Company\Project\Component::class;
}

and running CS check would fail, because we would need to run fixer again to receive expected:

<?php

use Company\Project\Component;

class Whatever
{
    protected string $component = Component::class;
}

[coveralls]

coverage: 94.755%. remained the same
when pulling a8c6c14 on krzysztofrewak:master
into eb833c9 on PHP-CS-Fixer:master.

[Wirone]

Thank you @krzysztofrewak 🍻!

[krzysztofrewak]

Thank you @krzysztofrewak 🍻!

Thank you, @Wirone, for help! 🚀