UnusedFollowedByRequire: fix up test class name

PHPUnit 10+ is stricter about naming conventions, so the test class name must now match the file name and the class should end on `Test`.

Tests/VariableAnalysisSniff/UnusedFollowedByRequireTest.php

@@ -4,7 +4,7 @@
 
 use VariableAnalysis\Tests\BaseTestCase;
 
-class UnusedFollowedByRequire extends BaseTestCase
+class UnusedFollowedByRequireTest extends BaseTestCase
 {
 	public function testUnusedFollowedByRequireWarnsByDefault()
 	{