Updates to 3rd party libraries

Add Dockerfile and specific docker-php.ini

inc/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/SettingsTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests;
+
+use PhpOffice\PhpSpreadsheet\Settings;
+use PHPUnit\Framework\TestCase;
+
+class SettingsTest extends TestCase
+{
+    /**
+     * @var string
+     */
+    protected $prevValue;
+
+    public function setUp()
+    {
+        $this->prevValue = libxml_disable_entity_loader();
+        libxml_disable_entity_loader(false); // Enable entity loader
+    }
+
+    protected function tearDown()
+    {
+        libxml_disable_entity_loader($this->prevValue);
+    }
+
+    public function testGetXMLSettings()
+    {
+        $result = Settings::getLibXmlLoaderOptions();
+        self::assertTrue((bool) ((LIBXML_DTDLOAD | LIBXML_DTDATTR) & $result));
+        self::assertFalse(libxml_disable_entity_loader());
+    }
+
+    public function testSetXMLSettings()
+    {
+        Settings::setLibXmlLoaderOptions(LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_DTDVALID);
+        $result = Settings::getLibXmlLoaderOptions();
+        self::assertTrue((bool) ((LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_DTDVALID) & $result));
+        self::assertFalse(libxml_disable_entity_loader());
+    }
+}