Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/theseer/tokenizer/src/XMLSerializer.php

@@ -1,79 +0,0 @@
-<?php declare(strict_types = 1);
-namespace TheSeer\Tokenizer;
-
-use DOMDocument;
-
-class XMLSerializer {
-
-    /** @var \XMLWriter */
-    private $writer;
-
-    /** @var Token */
-    private $previousToken;
-
-    /** @var NamespaceUri */
-    private $xmlns;
-
-    /**
-     * XMLSerializer constructor.
-     *
-     * @param NamespaceUri $xmlns
-     */
-    public function __construct(NamespaceUri $xmlns = null) {
-        if ($xmlns === null) {
-            $xmlns = new NamespaceUri('https://github.com/theseer/tokenizer');
-        }
-        $this->xmlns = $xmlns;
-    }
-
-    public function toDom(TokenCollection $tokens): DOMDocument {
-        $dom                     = new DOMDocument();
-        $dom->preserveWhiteSpace = false;
-        $dom->loadXML($this->toXML($tokens));
-
-        return $dom;
-    }
-
-    public function toXML(TokenCollection $tokens): string {
-        $this->writer = new \XMLWriter();
-        $this->writer->openMemory();
-        $this->writer->setIndent(true);
-        $this->writer->startDocument();
-        $this->writer->startElement('source');
-        $this->writer->writeAttribute('xmlns', $this->xmlns->asString());
-
-        if (\count($tokens) > 0) {
-            $this->writer->startElement('line');
-            $this->writer->writeAttribute('no', '1');
-
-            $this->previousToken = $tokens[0];
-
-            foreach ($tokens as $token) {
-                $this->addToken($token);
-            }
-        }
-
-        $this->writer->endElement();
-        $this->writer->endElement();
-        $this->writer->endDocument();
-
-        return $this->writer->outputMemory();
-    }
-
-    private function addToken(Token $token): void {
-        if ($this->previousToken->getLine() < $token->getLine()) {
-            $this->writer->endElement();
-
-            $this->writer->startElement('line');
-            $this->writer->writeAttribute('no', (string)$token->getLine());
-            $this->previousToken = $token;
-        }
-
-        if ($token->getValue() !== '') {
-            $this->writer->startElement('token');
-            $this->writer->writeAttribute('name', $token->getName());
-            $this->writer->writeRaw(\htmlspecialchars($token->getValue(), \ENT_NOQUOTES | \ENT_DISALLOWED | \ENT_XML1));
-            $this->writer->endElement();
-        }
-    }
-}