Updates to 3rd party libraries

Add Dockerfile and specific docker-php.ini

inc/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/Functional/EnclosureTest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Functional;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+class EnclosureTest extends AbstractFunctional
+{
+    public function providerFormats()
+    {
+        return [
+            ['Html'],
+            ['Xls'],
+            ['Xlsx'],
+            ['Ods'],
+            ['Csv'],
+        ];
+    }
+
+    /**
+     * @dataProvider providerFormats
+     *
+     * @param string $format
+     */
+    public function testEnclosure($format)
+    {
+        $value = '<img alt="" src="http://example.com/image.jpg" />';
+
+        $spreadsheet = new Spreadsheet();
+        $spreadsheet->getActiveSheet()->getCell('A1')->setValue($value);
+
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, $format);
+
+        $actual = $reloadedSpreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue();
+        self::assertSame($value, $actual, 'should be able to write and read strings with multiples quotes');
+    }
+}