fix: resolve remaining test suite issues

- Add strict types declaration to test files
- Update namespace reference in Pest.php configuration
- Update author email address in composer.json

Author: iamgerwin

composer.json

@@ -16,7 +16,7 @@
     "authors": [
         {
             "name": "Gerwin",
-            "email": "gerwin@example.com",
+            "email": "iamgerwin@live.com",
             "role": "Developer"
         }
     ],

tests/ArchTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Iamgerwin\GsmModem\Tests;
 
 arch('it will not use debugging functions')

tests/ExampleTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Iamgerwin\GsmModem\Tests;
 
 it('can test', function () {

tests/Pest.php

@@ -1,5 +1,5 @@
 <?php
 
-use VendorName\Skeleton\Tests\TestCase;
+use Iamgerwin\GsmModem\Tests\TestCase;
 
 uses(TestCase::class)->in(__DIR__);