Fixes #247 numbers in comments can cause php fatal errors.

src/PHPHtmlParser/Dom/Tag.php

@@ -329,6 +329,8 @@ public function makeOpeningTag()
             } catch (AttributeNotFoundException $e) {
                 // attribute that was in the array not found in the array... let's continue.
                 continue;
+            } catch (\TypeError $e) {
+              $val = null;
             }
             $val = $attributeDTO->getValue();
             if (\is_null($val)) {

tests/Node/TextTest.php

@@ -4,6 +4,7 @@
 
 use PHPHtmlParser\Dom;
 use PHPHtmlParser\Dom\Node\TextNode;
+use PHPHtmlParser\Options;
 use PHPUnit\Framework\TestCase;
 use stringEncode\Encode;
 
@@ -74,4 +75,14 @@ public function testSetTextEncoded()
         $node->setText('biz baz');
         $this->assertEquals('biz baz', $node->text());
     }
+
+    public function testCommentWithNumbers() {
+      $dom = new Dom;
+      $options = new Options();
+      $options->setCleanupInput(false);
+      $dom->setOptions($options);
+      $dom->loadStr('<!-- test comment with number 2 -->');
+      $output = $dom->outerHtml;
+      $this->assertContains('<!-- test comment with number 2 -->', $output);
+    }
 }