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diff --git a/vendor/swiftmailer/classes/Swift/Mime/SimpleMimeEntity.php b/vendor/swiftmailer/classes/Swift/Mime/SimpleMimeEntity.php
deleted file mode 100644
index d6950814..00000000
--- a/vendor/swiftmailer/classes/Swift/Mime/SimpleMimeEntity.php
+++ /dev/null
@@ -1,853 +0,0 @@
-<?php
-
-/*
- * This file is part of SwiftMailer.
- * (c) 2004-2009 Chris Corbyn
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-/**
- * A MIME entity, in a multipart message.
- *
- * @author     Chris Corbyn
- */
-class Swift_Mime_SimpleMimeEntity implements Swift_Mime_MimeEntity
-{
-    /** A collection of Headers for this mime entity */
-    private $_headers;
-
-    /** The body as a string, or a stream */
-    private $_body;
-
-    /** The encoder that encodes the body into a streamable format */
-    private $_encoder;
-
-    /** The grammar to use for id validation */
-    private $_grammar;
-
-    /** A mime boundary, if any is used */
-    private $_boundary;
-
-    /** Mime types to be used based on the nesting level */
-    private $_compositeRanges = array(
-        'multipart/mixed' => array(self::LEVEL_TOP, self::LEVEL_MIXED),
-        'multipart/alternative' => array(self::LEVEL_MIXED, self::LEVEL_ALTERNATIVE),
-        'multipart/related' => array(self::LEVEL_ALTERNATIVE, self::LEVEL_RELATED)
-    );
-
-    /** A set of filter rules to define what level an entity should be nested at */
-    private $_compoundLevelFilters = array();
-
-    /** The nesting level of this entity */
-    private $_nestingLevel = self::LEVEL_ALTERNATIVE;
-
-    /** A KeyCache instance used during encoding and streaming */
-    private $_cache;
-
-    /** Direct descendants of this entity */
-    private $_immediateChildren = array();
-
-    /** All descendants of this entity */
-    private $_children = array();
-
-    /** The maximum line length of the body of this entity */
-    private $_maxLineLength = 78;
-
-    /** The order in which alternative mime types should appear */
-    private $_alternativePartOrder = array(
-        'text/plain' => 1,
-        'text/html' => 2,
-        'multipart/related' => 3
-    );
-
-    /** The CID of this entity */
-    private $_id;
-
-    /** The key used for accessing the cache */
-    private $_cacheKey;
-
-    protected $_userContentType;
-
-    /**
-     * Create a new SimpleMimeEntity with $headers, $encoder and $cache.
-     *
-     * @param Swift_Mime_HeaderSet      $headers
-     * @param Swift_Mime_ContentEncoder $encoder
-     * @param Swift_KeyCache            $cache
-     * @param Swift_Mime_Grammar        $grammar
-     */
-    public function __construct(Swift_Mime_HeaderSet $headers, Swift_Mime_ContentEncoder $encoder, Swift_KeyCache $cache, Swift_Mime_Grammar $grammar)
-    {
-        $this->_cacheKey = md5(uniqid(getmypid().mt_rand(), true));
-        $this->_cache = $cache;
-        $this->_headers = $headers;
-        $this->_grammar = $grammar;
-        $this->setEncoder($encoder);
-        $this->_headers->defineOrdering(array('Content-Type', 'Content-Transfer-Encoding'));
-
-        // This array specifies that, when the entire MIME document contains
-        // $compoundLevel, then for each child within $level, if its Content-Type
-        // is $contentType then it should be treated as if it's level is
-        // $neededLevel instead.  I tried to write that unambiguously! :-\
-        // Data Structure:
-        // array (
-        //   $compoundLevel => array(
-        //     $level => array(
-        //       $contentType => $neededLevel
-        //     )
-        //   )
-        // )
-
-        $this->_compoundLevelFilters = array(
-            (self::LEVEL_ALTERNATIVE + self::LEVEL_RELATED) => array(
-                self::LEVEL_ALTERNATIVE => array(
-                    'text/plain' => self::LEVEL_ALTERNATIVE,
-                    'text/html' => self::LEVEL_RELATED
-                    )
-                )
-            );
-
-        $this->_id = $this->getRandomId();
-    }
-
-    /**
-     * Generate a new Content-ID or Message-ID for this MIME entity.
-     *
-     * @return string
-     */
-    public function generateId()
-    {
-        $this->setId($this->getRandomId());
-
-        return $this->_id;
-    }
-
-    /**
-     * Get the {@link Swift_Mime_HeaderSet} for this entity.
-     *
-     * @return Swift_Mime_HeaderSet
-     */
-    public function getHeaders()
-    {
-        return $this->_headers;
-    }
-
-    /**
-     * Get the nesting level of this entity.
-     *
-     * @see LEVEL_TOP, LEVEL_MIXED, LEVEL_RELATED, LEVEL_ALTERNATIVE
-     *
-     * @return int
-     */
-    public function getNestingLevel()
-    {
-        return $this->_nestingLevel;
-    }
-
-    /**
-     * Get the Content-type of this entity.
-     *
-     * @return string
-     */
-    public function getContentType()
-    {
-        return $this->_getHeaderFieldModel('Content-Type');
-    }
-
-    /**
-     * Set the Content-type of this entity.
-     *
-     * @param string $type
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setContentType($type)
-    {
-        $this->_setContentTypeInHeaders($type);
-        // Keep track of the value so that if the content-type changes automatically
-        // due to added child entities, it can be restored if they are later removed
-        $this->_userContentType = $type;
-
-        return $this;
-    }
-
-    /**
-     * Get the CID of this entity.
-     *
-     * The CID will only be present in headers if a Content-ID header is present.
-     *
-     * @return string
-     */
-    public function getId()
-    {
-        $tmp = (array) $this->_getHeaderFieldModel($this->_getIdField());
-
-        return $this->_headers->has($this->_getIdField()) ? current($tmp) : $this->_id;
-    }
-
-    /**
-     * Set the CID of this entity.
-     *
-     * @param string $id
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setId($id)
-    {
-        if (!$this->_setHeaderFieldModel($this->_getIdField(), $id)) {
-            $this->_headers->addIdHeader($this->_getIdField(), $id);
-        }
-        $this->_id = $id;
-
-        return $this;
-    }
-
-    /**
-     * Get the description of this entity.
-     *
-     * This value comes from the Content-Description header if set.
-     *
-     * @return string
-     */
-    public function getDescription()
-    {
-        return $this->_getHeaderFieldModel('Content-Description');
-    }
-
-    /**
-     * Set the description of this entity.
-     *
-     * This method sets a value in the Content-ID header.
-     *
-     * @param string $description
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setDescription($description)
-    {
-        if (!$this->_setHeaderFieldModel('Content-Description', $description)) {
-            $this->_headers->addTextHeader('Content-Description', $description);
-        }
-
-        return $this;
-    }
-
-    /**
-     * Get the maximum line length of the body of this entity.
-     *
-     * @return int
-     */
-    public function getMaxLineLength()
-    {
-        return $this->_maxLineLength;
-    }
-
-    /**
-     * Set the maximum line length of lines in this body.
-     *
-     * Though not enforced by the library, lines should not exceed 1000 chars.
-     *
-     * @param int     $length
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setMaxLineLength($length)
-    {
-        $this->_maxLineLength = $length;
-
-        return $this;
-    }
-
-    /**
-     * Get all children added to this entity.
-     *
-     * @return array of Swift_Mime_Entity
-     */
-    public function getChildren()
-    {
-        return $this->_children;
-    }
-
-    /**
-     * Set all children of this entity.
-     *
-     * @param array   $children      Swift_Mime_Entity instances
-     * @param int     $compoundLevel For internal use only
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setChildren(array $children, $compoundLevel = null)
-    {
-        // TODO: Try to refactor this logic
-
-        $compoundLevel = isset($compoundLevel)
-            ? $compoundLevel
-            : $this->_getCompoundLevel($children)
-            ;
-
-        $immediateChildren = array();
-        $grandchildren = array();
-        $newContentType = $this->_userContentType;
-
-        foreach ($children as $child) {
-            $level = $this->_getNeededChildLevel($child, $compoundLevel);
-            if (empty($immediateChildren)) { //first iteration
-                $immediateChildren = array($child);
-            } else {
-                $nextLevel = $this->_getNeededChildLevel($immediateChildren[0], $compoundLevel);
-                if ($nextLevel == $level) {
-                    $immediateChildren[] = $child;
-                } elseif ($level < $nextLevel) {
-                    // Re-assign immediateChildren to grandchildren
-                    $grandchildren = array_merge($grandchildren, $immediateChildren);
-                    // Set new children
-                    $immediateChildren = array($child);
-                } else {
-                    $grandchildren[] = $child;
-                }
-            }
-        }
-
-        if (!empty($immediateChildren)) {
-            $lowestLevel = $this->_getNeededChildLevel($immediateChildren[0], $compoundLevel);
-
-            // Determine which composite media type is needed to accommodate the
-            // immediate children
-            foreach ($this->_compositeRanges as $mediaType => $range) {
-                if ($lowestLevel > $range[0]
-                    && $lowestLevel <= $range[1])
-                {
-                    $newContentType = $mediaType;
-                    break;
-                }
-            }
-
-            // Put any grandchildren in a subpart
-            if (!empty($grandchildren)) {
-                $subentity = $this->_createChild();
-                $subentity->_setNestingLevel($lowestLevel);
-                $subentity->setChildren($grandchildren, $compoundLevel);
-                array_unshift($immediateChildren, $subentity);
-            }
-        }
-
-        $this->_immediateChildren = $immediateChildren;
-        $this->_children = $children;
-        $this->_setContentTypeInHeaders($newContentType);
-        $this->_fixHeaders();
-        $this->_sortChildren();
-
-        return $this;
-    }
-
-    /**
-     * Get the body of this entity as a string.
-     *
-     * @return string
-     */
-    public function getBody()
-    {
-        return ($this->_body instanceof Swift_OutputByteStream)
-            ? $this->_readStream($this->_body)
-            : $this->_body;
-    }
-
-    /**
-     * Set the body of this entity, either as a string, or as an instance of
-     * {@link Swift_OutputByteStream}.
-     *
-     * @param mixed  $body
-     * @param string $contentType optional
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setBody($body, $contentType = null)
-    {
-        if ($body !== $this->_body) {
-            $this->_clearCache();
-        }
-
-        $this->_body = $body;
-        if (isset($contentType)) {
-            $this->setContentType($contentType);
-        }
-
-        return $this;
-    }
-
-    /**
-     * Get the encoder used for the body of this entity.
-     *
-     * @return Swift_Mime_ContentEncoder
-     */
-    public function getEncoder()
-    {
-        return $this->_encoder;
-    }
-
-    /**
-     * Set the encoder used for the body of this entity.
-     *
-     * @param Swift_Mime_ContentEncoder $encoder
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     */
-    public function setEncoder(Swift_Mime_ContentEncoder $encoder)
-    {
-        if ($encoder !== $this->_encoder) {
-            $this->_clearCache();
-        }
-
-        $this->_encoder = $encoder;
-        $this->_setEncoding($encoder->getName());
-        $this->_notifyEncoderChanged($encoder);
-
-        return $this;
-    }
-
-    /**
-     * Get the boundary used to separate children in this entity.
-     *
-     * @return string
-     */
-    public function getBoundary()
-    {
-        if (!isset($this->_boundary)) {
-            $this->_boundary = '_=_swift_v4_' . time() . '_' . md5(getmypid().mt_rand().uniqid('', true)) . '_=_';
-        }
-
-        return $this->_boundary;
-    }
-
-    /**
-     * Set the boundary used to separate children in this entity.
-     *
-     * @param string $boundary
-     *
-     * @return Swift_Mime_SimpleMimeEntity
-     *
-     * @throws Swift_RfcComplianceException
-     */
-    public function setBoundary($boundary)
-    {
-        $this->_assertValidBoundary($boundary);
-        $this->_boundary = $boundary;
-
-        return $this;
-    }
-
-    /**
-     * Receive notification that the charset of this entity, or a parent entity
-     * has changed.
-     *
-     * @param string $charset
-     */
-    public function charsetChanged($charset)
-    {
-        $this->_notifyCharsetChanged($charset);
-    }
-
-    /**
-     * Receive notification that the encoder of this entity or a parent entity
-     * has changed.
-     *
-     * @param Swift_Mime_ContentEncoder $encoder
-     */
-    public function encoderChanged(Swift_Mime_ContentEncoder $encoder)
-    {
-        $this->_notifyEncoderChanged($encoder);
-    }
-
-    /**
-     * Get this entire entity as a string.
-     *
-     * @return string
-     */
-    public function toString()
-    {
-        $string = $this->_headers->toString();
-        $string .= $this->_bodyToString();
-
-        return $string;
-    }
-
-    /**
-     * Get this entire entity as a string.
-     *
-     * @return string
-     */
-    protected function _bodyToString()
-    {
-        $string = '';
-
-        if (isset($this->_body) && empty($this->_immediateChildren)) {
-            if ($this->_cache->hasKey($this->_cacheKey, 'body')) {
-                $body = $this->_cache->getString($this->_cacheKey, 'body');
-            } else {
-                $body = "\r\n" . $this->_encoder->encodeString($this->getBody(), 0,
-                    $this->getMaxLineLength()
-                    );
-                $this->_cache->setString($this->_cacheKey, 'body', $body,
-                    Swift_KeyCache::MODE_WRITE
-                    );
-            }
-            $string .= $body;
-        }
-
-        if (!empty($this->_immediateChildren)) {
-            foreach ($this->_immediateChildren as $child) {
-                $string .= "\r\n\r\n--" . $this->getBoundary() . "\r\n";
-                $string .= $child->toString();
-            }
-            $string .= "\r\n\r\n--" . $this->getBoundary() . "--\r\n";
-        }
-
-        return $string;
-    }
-
-    /**
-     * Returns a string representation of this object.
-     *
-     * @see toString()
-     *
-     * @return string
-     */
-    public function __toString()
-    {
-        return $this->toString();
-    }
-
-    /**
-     * Write this entire entity to a {@see Swift_InputByteStream}.
-     *
-     * @param Swift_InputByteStream
-     */
-    public function toByteStream(Swift_InputByteStream $is)
-    {
-        $is->write($this->_headers->toString());
-        $is->commit();
-
-        $this->_bodyToByteStream($is);
-    }
-
-    /**
-     * Write this entire entity to a {@link Swift_InputByteStream}.
-     *
-     * @param Swift_InputByteStream
-     */
-    protected function _bodyToByteStream(Swift_InputByteStream $is)
-    {
-        if (empty($this->_immediateChildren)) {
-            if (isset($this->_body)) {
-                if ($this->_cache->hasKey($this->_cacheKey, 'body')) {
-                    $this->_cache->exportToByteStream($this->_cacheKey, 'body', $is);
-                } else {
-                    $cacheIs = $this->_cache->getInputByteStream($this->_cacheKey, 'body');
-                    if ($cacheIs) {
-                        $is->bind($cacheIs);
-                    }
-
-                    $is->write("\r\n");
-
-                    if ($this->_body instanceof Swift_OutputByteStream) {
-                        $this->_body->setReadPointer(0);
-
-                        $this->_encoder->encodeByteStream($this->_body, $is, 0, $this->getMaxLineLength());
-                    } else {
-                        $is->write($this->_encoder->encodeString($this->getBody(), 0, $this->getMaxLineLength()));
-                    }
-
-                    if ($cacheIs) {
-                        $is->unbind($cacheIs);
-                    }
-                }
-            }
-        }
-
-        if (!empty($this->_immediateChildren)) {
-            foreach ($this->_immediateChildren as $child) {
-                $is->write("\r\n\r\n--" . $this->getBoundary() . "\r\n");
-                $child->toByteStream($is);
-            }
-            $is->write("\r\n\r\n--" . $this->getBoundary() . "--\r\n");
-        }
-    }
-
-    /**
-     * Get the name of the header that provides the ID of this entity
-     */
-    protected function _getIdField()
-    {
-        return 'Content-ID';
-    }
-
-    /**
-     * Get the model data (usually an array or a string) for $field.
-     */
-    protected function _getHeaderFieldModel($field)
-    {
-        if ($this->_headers->has($field)) {
-            return $this->_headers->get($field)->getFieldBodyModel();
-        }
-    }
-
-    /**
-     * Set the model data for $field.
-     */
-    protected function _setHeaderFieldModel($field, $model)
-    {
-        if ($this->_headers->has($field)) {
-            $this->_headers->get($field)->setFieldBodyModel($model);
-
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * Get the parameter value of $parameter on $field header.
-     */
-    protected function _getHeaderParameter($field, $parameter)
-    {
-        if ($this->_headers->has($field)) {
-            return $this->_headers->get($field)->getParameter($parameter);
-        }
-    }
-
-    /**
-     * Set the parameter value of $parameter on $field header.
-     */
-    protected function _setHeaderParameter($field, $parameter, $value)
-    {
-        if ($this->_headers->has($field)) {
-            $this->_headers->get($field)->setParameter($parameter, $value);
-
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * Re-evaluate what content type and encoding should be used on this entity.
-     */
-    protected function _fixHeaders()
-    {
-        if (count($this->_immediateChildren)) {
-            $this->_setHeaderParameter('Content-Type', 'boundary',
-                $this->getBoundary()
-                );
-            $this->_headers->remove('Content-Transfer-Encoding');
-        } else {
-            $this->_setHeaderParameter('Content-Type', 'boundary', null);
-            $this->_setEncoding($this->_encoder->getName());
-        }
-    }
-
-    /**
-     * Get the KeyCache used in this entity.
-     *
-     * @return Swift_KeyCache
-     */
-    protected function _getCache()
-    {
-        return $this->_cache;
-    }
-
-    /**
-     * Get the grammar used for validation.
-     *
-     * @return Swift_Mime_Grammar
-     */
-    protected function _getGrammar()
-    {
-        return $this->_grammar;
-    }
-
-    /**
-     * Empty the KeyCache for this entity.
-     */
-    protected function _clearCache()
-    {
-        $this->_cache->clearKey($this->_cacheKey, 'body');
-    }
-
-    /**
-     * Returns a random Content-ID or Message-ID.
-     *
-     * @return string
-     */
-    protected function getRandomId()
-    {
-        $idLeft = md5(getmypid() . '.' . time() . '.' . uniqid(mt_rand(), true));
-        $idRight = !empty($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'swift.generated';
-        $id = $idLeft . '@' . $idRight;
-
-        try {
-            $this->_assertValidId($id);
-        } catch (Swift_RfcComplianceException $e) {
-            $id = $idLeft . '@swift.generated';
-        }
-
-        return $id;
-    }
-
-    private function _readStream(Swift_OutputByteStream $os)
-    {
-        $string = '';
-        while (false !== $bytes = $os->read(8192)) {
-            $string .= $bytes;
-        }
-
-        return $string;
-    }
-
-    private function _setEncoding($encoding)
-    {
-        if (!$this->_setHeaderFieldModel('Content-Transfer-Encoding', $encoding)) {
-            $this->_headers->addTextHeader('Content-Transfer-Encoding', $encoding);
-        }
-    }
-
-    private function _assertValidBoundary($boundary)
-    {
-        if (!preg_match(
-            '/^[a-z0-9\'\(\)\+_\-,\.\/:=\?\ ]{0,69}[a-z0-9\'\(\)\+_\-,\.\/:=\?]$/Di',
-            $boundary))
-        {
-            throw new Swift_RfcComplianceException('Mime boundary set is not RFC 2046 compliant.');
-        }
-    }
-
-    private function _setContentTypeInHeaders($type)
-    {
-        if (!$this->_setHeaderFieldModel('Content-Type', $type)) {
-            $this->_headers->addParameterizedHeader('Content-Type', $type);
-        }
-    }
-
-    private function _setNestingLevel($level)
-    {
-        $this->_nestingLevel = $level;
-    }
-
-    private function _getCompoundLevel($children)
-    {
-        $level = 0;
-        foreach ($children as $child) {
-            $level |= $child->getNestingLevel();
-        }
-
-        return $level;
-    }
-
-    private function _getNeededChildLevel($child, $compoundLevel)
-    {
-        $filter = array();
-        foreach ($this->_compoundLevelFilters as $bitmask => $rules) {
-            if (($compoundLevel & $bitmask) === $bitmask) {
-                $filter = $rules + $filter;
-            }
-        }
-
-        $realLevel = $child->getNestingLevel();
-        $lowercaseType = strtolower($child->getContentType());
-
-        if (isset($filter[$realLevel])
-            && isset($filter[$realLevel][$lowercaseType]))
-        {
-            return $filter[$realLevel][$lowercaseType];
-        } else {
-            return $realLevel;
-        }
-    }
-
-    private function _createChild()
-    {
-        return new self($this->_headers->newInstance(),
-            $this->_encoder, $this->_cache, $this->_grammar);
-    }
-
-    private function _notifyEncoderChanged(Swift_Mime_ContentEncoder $encoder)
-    {
-        foreach ($this->_immediateChildren as $child) {
-            $child->encoderChanged($encoder);
-        }
-    }
-
-    private function _notifyCharsetChanged($charset)
-    {
-        $this->_encoder->charsetChanged($charset);
-        $this->_headers->charsetChanged($charset);
-        foreach ($this->_immediateChildren as $child) {
-            $child->charsetChanged($charset);
-        }
-    }
-
-    private function _sortChildren()
-    {
-        $shouldSort = false;
-        foreach ($this->_immediateChildren as $child) {
-            // NOTE: This include alternative parts moved into a related part
-            if ($child->getNestingLevel() == self::LEVEL_ALTERNATIVE) {
-                $shouldSort = true;
-                break;
-            }
-        }
-
-        // Sort in order of preference, if there is one
-        if ($shouldSort) {
-            usort($this->_immediateChildren, array($this, '_childSortAlgorithm'));
-        }
-    }
-
-    private function _childSortAlgorithm($a, $b)
-    {
-        $typePrefs = array();
-        $types = array(
-            strtolower($a->getContentType()),
-            strtolower($b->getContentType())
-            );
-        foreach ($types as $type) {
-            $typePrefs[] = (array_key_exists($type, $this->_alternativePartOrder))
-                ? $this->_alternativePartOrder[$type]
-                : (max($this->_alternativePartOrder) + 1);
-        }
-
-        return ($typePrefs[0] >= $typePrefs[1]) ? 1 : -1;
-    }
-
-    // -- Destructor
-
-    /**
-     * Empties it's own contents from the cache.
-     */
-    public function __destruct()
-    {
-        $this->_cache->clearAll($this->_cacheKey);
-    }
-
-    /**
-     * Throws an Exception if the id passed does not comply with RFC 2822.
-     *
-     * @param string $id
-     *
-     * @throws Swift_RfcComplianceException
-     */
-    private function _assertValidId($id)
-    {
-        if (!preg_match(
-            '/^' . $this->_grammar->getDefinition('id-left') . '@' .
-            $this->_grammar->getDefinition('id-right') . '$/D',
-            $id
-            ))
-        {
-            throw new Swift_RfcComplianceException(
-                'Invalid ID given <' . $id . '>'
-                );
-        }
-    }
-}