Make order of use statements case-insensitive

Problem

The current rule set requires a case-sensitive sort on use statements. So if a namespace begins with a small letter then it has to go at the end e.g.

use Cap_Model_Org;
use PHPUnit\Framework\TestCase;
use org\bovigo\vfs\vfsStream;

This is counter-intuitive.

Solution

Change the value of the following property to false:

<rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses">
        <properties>
            <property name="caseSensitive" value="true"/>
        </properties>
    </rule>