code: public function processStrikeThrough(Text $text)
      {
          /** @noinspection PhpUnusedParameterInspection */
          $text->replace('{ (~~) (?=\S) (.+?) (?<=\S) \1 }sx', function (Text $w, Text $a, Text $target) {
              return $this->getRenderer()->renderTag('del', $target, Tag::TYPE_INLINE);
          });
      }
docs: Strike-through `~~word~~` to `<del>word</del>`
  
  @param Text $text