Laravel 5.6 updates

Travis config update

Removed HHVM script as Laravel no longer support HHVM after releasing 5.3

vendor/symfony/process/Exception/ProcessSignaledException.php

@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Process\Exception;
+
+use Symfony\Component\Process\Process;
+
+/**
+ * Exception that is thrown when a process has been signaled.
+ *
+ * @author Sullivan Senechal <soullivaneuh@gmail.com>
+ */
+final class ProcessSignaledException extends RuntimeException
+{
+    private $process;
+
+    public function __construct(Process $process)
+    {
+        $this->process = $process;
+
+        parent::__construct(sprintf('The process has been signaled with signal "%s".', $process->getTermSignal()));
+    }
+
+    public function getProcess(): Process
+    {
+        return $this->process;
+    }
+
+    public function getSignal(): int
+    {
+        return $this->getProcess()->getTermSignal();
+    }
+}

vendor/symfony/process/Exception/ProcessTimedOutException.php

@@ -26,7 +26,7 @@ class ProcessTimedOutException extends RuntimeException
     private $process;
     private $timeoutType;
 
-    public function __construct(Process $process, $timeoutType)
+    public function __construct(Process $process, int $timeoutType)
     {
         $this->process = $process;
         $this->timeoutType = $timeoutType;