update dictionary

Author: nejcdev

Tests/DictionaryTest.php

@@ -1,6 +1,11 @@
 <?php
+declare(strict_types=1);
 
+namespace Nejcc\PhpDatatypes\Tests;
+
+use InvalidArgumentException;
 use Nejcc\PhpDatatypes\Composite\Dictionary;
+use OutOfBoundsException;
 use PHPUnit\Framework\TestCase;
 
 class DictionaryTest extends TestCase

src/Composite/Dictionary.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 
 namespace Nejcc\PhpDatatypes\Composite;