Underline and shadow of text not converted to pdf

[tomfree]

Describe the bug
I find that when I have underlined text or text with shadow and apply the svg2pdf conversion in the pdf I have neither underline nor shadow.

To Reproduce
Steps to reproduce the behavior:

1. With the following SVG (see file attached) and adding it to the playground: http://raw.githack.com/yWorks/svg2pdf.js/master/
2. I get this result (see attached pdf file) with missing underline and shadow

Expected behavior
I would have expected the PDF to look similar but have underlining and shadow

This is in accordance to the following SVG spec - This I am not sure of, but since the stuff is in the svg I had expected to find it in the pdf.

sample.pdf