diff -ruN ./vendor/phpunit/phpunit/src/Framework/Constraint.php ./vendor/phpunit/phpunit/src/Framework/Constraint.php
--- ./vendor/phpunit/phpunit/src/Framework/Constraint.php	2017-06-21 10:07:12.000000000 +0200
+++ ./vendor/phpunit/phpunit/src/Framework/Constraint.php	2021-09-17 15:09:21.000000000 +0200
@@ -81,6 +81,7 @@
      *
      * @since  Method available since Release 3.4.0
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return 1;
diff -ruN ./vendor/phpunit/phpunit/src/Util/Configuration.php ./vendor/phpunit/phpunit/src/Util/Configuration.php
--- ./vendor/phpunit/phpunit/src/Util/Configuration.php	2017-06-21 10:07:12.000000000 +0200
+++ ./vendor/phpunit/phpunit/src/Util/Configuration.php	2021-09-17 14:46:32.000000000 +0200
@@ -162,7 +162,7 @@
     /**
      * @since  Method available since Release 3.4.0
      */
-    final private function __clone()
+    private function __clone()
     {
     }
 
@@ -516,7 +516,7 @@
             // See https://github.com/sebastianbergmann/phpunit/issues/277
             switch ($array) {
                 case 'var':
-                    $target = &$GLOBALS;
+//                    $target = &$GLOBALS;
                     break;
 
                 case 'server':
diff -ruN ./vendor/phpunit/phpunit/src/Util/Getopt.php ./vendor/phpunit/phpunit/src/Util/Getopt.php
--- ./vendor/phpunit/phpunit/src/Util/Getopt.php	2017-06-21 10:07:12.000000000 +0200
+++ ./vendor/phpunit/phpunit/src/Util/Getopt.php	2021-09-17 15:04:26.000000000 +0200
@@ -21,7 +21,7 @@
             return array(array(), array());
         }
 
-        $opts     = array();
+        $opts = array();
         $non_opts = array();
 
         if ($long_options) {
@@ -35,7 +35,10 @@
         reset($args);
         array_map('trim', $args);
 
-        while (list($i, $arg) = each($args)) {
+
+        for ($i = 0; $i < count($args); $i++) {
+            $arg = $args[$i];
+
             if ($arg == '') {
                 continue;
             }
@@ -45,24 +48,30 @@
                 break;
             }
 
+            $nextArg = isset($args[$i]) ? $args[$i] : null;
+
             if ($arg[0] != '-' ||
                 (strlen($arg) > 1 && $arg[1] == '-' && !$long_options)) {
                 $non_opts[] = $args[$i];
                 continue;
             } elseif (strlen($arg) > 1 && $arg[1] == '-') {
-                self::parseLongOption(
+                if (self::parseLongOption(
                     substr($arg, 2),
                     $long_options,
                     $opts,
-                    $args
-                );
+                    $nextArg
+                )) {
+                    $i++;
+                }
             } else {
-                self::parseShortOption(
+                if (self::parseShortOption(
                     substr($arg, 1),
                     $short_options,
                     $opts,
-                    $args
-                );
+                    $nextArg
+                )) {
+                    $i++;
+                }
             }
         }
 
@@ -74,7 +83,7 @@
         $argLen = strlen($arg);
 
         for ($i = 0; $i < $argLen; $i++) {
-            $opt     = $arg[$i];
+            $opt = $arg[$i];
             $opt_arg = null;
 
             if (($spec = strstr($short_options, $opt)) === false ||
@@ -107,11 +116,11 @@
         }
     }
 
-    protected static function parseLongOption($arg, $long_options, &$opts, &$args)
+    protected static function parseLongOption($arg, $long_options, &$opts, $nextArg)
     {
-        $count   = count($long_options);
-        $list    = explode('=', $arg);
-        $opt     = $list[0];
+        $count = count($long_options);
+        $list = explode('=', $arg);
+        $opt = $list[0];
         $opt_arg = null;
 
         if (count($list) > 1) {
@@ -121,7 +130,7 @@
         $opt_len = strlen($opt);
 
         for ($i = 0; $i < $count; $i++) {
-            $long_opt  = $long_options[$i];
+            $long_opt = $long_options[$i];
             $opt_start = substr($long_opt, 0, $opt_len);
 
             if ($opt_start != $opt) {
@@ -131,20 +140,24 @@
             $opt_rest = substr($long_opt, $opt_len);
 
             if ($opt_rest != '' && $opt[0] != '=' && $i + 1 < $count &&
-                $opt == substr($long_options[$i+1], 0, $opt_len)) {
+                $opt == substr($long_options[$i + 1], 0, $opt_len)) {
                 throw new PHPUnit_Framework_Exception(
                     "option --$opt is ambiguous"
                 );
             }
 
+            $ret = false;
+
             if (substr($long_opt, -1) == '=') {
                 if (substr($long_opt, -2) != '==') {
-                    if (!strlen($opt_arg) &&
-                        !(list(, $opt_arg) = each($args))) {
+                    if (empty($opt_arg) &&
+                        empty($nextArg) /*false*/) {
                         throw new PHPUnit_Framework_Exception(
                             "option --$opt requires an argument"
                         );
                     }
+
+                    $ret = true;
                 }
             } elseif ($opt_arg) {
                 throw new PHPUnit_Framework_Exception(
@@ -153,9 +166,9 @@
             }
 
             $full_option = '--' . preg_replace('/={1,2}$/', '', $long_opt);
-            $opts[]      = array($full_option, $opt_arg);
+            $opts[] = array($full_option, $opt_arg);
 
-            return;
+            return $ret;
         }
 
         throw new PHPUnit_Framework_Exception("unrecognized option --$opt");