Merge pull request #26 from colonelpopcorn/issue/number-25

Update MarkdownPlusHelper.php

Author: creecros

Helper/MarkdownPlusHelper.php

@@ -7,7 +7,7 @@
 require __DIR__.'/../vendor/joypixels/emoji-toolkit/lib/php/autoload.php';
 
 use Kanboard\Plugin\MarkdownPlus\Helper\CoreMarkdown;
-use Kanboard\Core\Base;
+use Kanboard\Helper\TextHelper;
 use JoyPixels\Client;
 use JoyPixels\RuleSet;
 use ParsedownCheckbox;
@@ -21,7 +21,7 @@
  * @author  Frederic Guillot
  * @additions Craig Crosby
  */
-class MarkdownPlusHelper extends Base
+class MarkdownPlusHelper extends TextHelper
 {
     /**
      * HTML escaping
@@ -147,4 +147,4 @@ public function in($id, array $listing, $default_value = '?')
 
         return $default_value;
     }
-}
+}