Fix PSR namespaces

[Jeroeny]

• Bugfix
• BC: There is a difference in the output of PsrPrinter

The PSR standard(s) seem to indicate that they use a newline between use statements of different types (class, function and const).
It would be nice if this could be supported

[dg]

Thanks!

[dg]

What is the $psrSort for?

[Jeroeny]

What is the $psrSort for?

It fixes the namespace sort:

before

namespace Example;

use Example\Foo\EmailAlias\Bar;
use Example\Foo\Email\Test;
use Example\Foo\MyClass;
use Example\Foo\Other;

after

namespace Example;

use Example\Foo\Email\Test;
use Example\Foo\EmailAlias\Bar;
use Example\Foo\MyClass;
use Example\Foo\Other;

Maybe it can be supported but not by default enabled in any printer?

[dg]

@Jeroeny okay, I'm gonna use that as the default sort.