LibWeb: Add HTMLTableCellElement::rowSpan

Author: https://github.com/skyrising
Commit: bc4974648c
Pull-request: https://github.com/SerenityOS/serenity/pull/13323
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.h

@@ -18,7 +18,10 @@ public:
     virtual ~HTMLTableCellElement() override;
 
     unsigned col_span() const;
+    unsigned row_span() const;
+
     void set_col_span(unsigned);
+    void set_row_span(unsigned);
 
 private:
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;