Add new optional beta email parser thats based on ImapEngine instead of Webklex

plugins/vendor/laravel/serializable-closure/src/Exceptions/InvalidSignatureException.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Laravel\SerializableClosure\Exceptions;
+
+use Exception;
+
+class InvalidSignatureException extends Exception
+{
+    /**
+     * Create a new exception instance.
+     *
+     * @param  string  $message
+     * @return void
+     */
+    public function __construct($message = 'Your serialized closure might have been modified or it\'s unsafe to be unserialized.')
+    {
+        parent::__construct($message);
+    }
+}

plugins/vendor/laravel/serializable-closure/src/Exceptions/MissingSecretKeyException.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Laravel\SerializableClosure\Exceptions;
+
+use Exception;
+
+class MissingSecretKeyException extends Exception
+{
+    /**
+     * Create a new exception instance.
+     *
+     * @param  string  $message
+     * @return void
+     */
+    public function __construct($message = 'No serializable closure secret key has been specified.')
+    {
+        parent::__construct($message);
+    }
+}

plugins/vendor/laravel/serializable-closure/src/Exceptions/PhpVersionNotSupportedException.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Laravel\SerializableClosure\Exceptions;
+
+use Exception;
+
+class PhpVersionNotSupportedException extends Exception
+{
+    /**
+     * Create a new exception instance.
+     *
+     * @param  string  $message
+     * @return void
+     */
+    public function __construct($message = 'PHP 7.3 is not supported.')
+    {
+        parent::__construct($message);
+    }
+}