Add missing declare_strict

src/Api/Skill.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Api;
 
 /*

src/Api/SkillSet.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Api;
 
 /*

src/Constants/VerificationTypes.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 define('VERIFICATION_SELF', 'self');
 define('VERIFICATION_EDUCATIONAL', 'education');
 define('VERIFICATION_BUSINESS', 'business');

src/Entity/Skill.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Entity;
 
 /*

src/Entity/SkillSet.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Entity;
 
 /*

tests/Unit/Api/SkillSetTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Tests\Unit\Api;
 
 /*

tests/Unit/Api/SkillTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Tests\Unit\Api;
 
 /*

tests/Unit/Entity/SkillSetTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Tests\Unit\Entity;
 
 /*

tests/Unit/Entity/SkillTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SkillDisplay\PHPToolKit\Tests\Unit\Entity;
 
 /*