Add strict types to utilities [skip ci]

Author: pinepain

scripts/refresh-package-xml.php

@@ -1,5 +1,6 @@
 #!/usr/bin/env php
-<?php
+<?php declare(strict_types=1);
+
 /**
  * This file is part of the pinepain/php-v8 PHP extension.
  *

scripts/replace_expect.php

@@ -1,5 +1,5 @@
 #!/usr/bin/env php
-<?php
+<?php declare(strict_types=1);
 /**
  * This file is part of the pinepain/php-v8 PHP extension.
  *

tests/.testsuite.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 /**
  * This file is part of the pinepain/php-v8 PHP extension.
@@ -23,8 +23,6 @@ function exception_error_handler($errno, $errstr, $errfile, $errline)
 
 class PhpV8Testsuite
 {
-    private $dumper = 'var_dump';
-
     public function header($title)
     {
         echo $title, ':', PHP_EOL;

tests/.tracking_dtors.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 /**
  * This file is part of the pinepain/php-v8 PHP extension.

tests/.v8-helpers.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 /**
  * This file is part of the pinepain/php-v8 PHP extension.

tests/001.phpt

@@ -3,7 +3,7 @@ Check for v8 presence
 --SKIPIF--
 <?php if (!extension_loaded("v8")) print "skip"; ?>
 --FILE--
-<?php 
+<?php
 echo "v8 extension is available";
 ?>
 --EXPECT--