Small cleanup

src/Formatter.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types = 1);
+
 namespace LanguageServer;
 
 use LanguageServer\Protocol\{TextEdit, Range, Position, ErrorCode};

tests/FormatterTest.php

@@ -1,7 +1,7 @@
 <?php
 declare(strict_types = 1);
 
-namespace LanguageServer\Tests\Server;
+namespace LanguageServer\Tests;
 
 use PHPUnit\Framework\TestCase;
 use LanguageServer\Formatter;