Silence future warning

[uwardlaw]

When I execute book = epub.read_epub("valid.epub", {"ignore_ncx": True})

I get a future warning:

\Lib\site-packages\ebooklib\epub.py:1423: FutureWarning: This search incorrectly ignores the root element, and will be fixed in a future version.  If you rely on the current behaviour, change it to './/xmlns:rootfile[@media-type]'
  for root_file in tree.findall('//xmlns:rootfile[@media-type]', namespaces={'xmlns': NAMESPACES['CONTAINERNS']}):

Is there a way to silence this warning without altering the code, like with the ignore_ncx? Thanks.

[therb1]

I'm creating a PR to solve this problem, if I understand correctly what the warrning creator wanted, then my PR should solve the problem
#323

[haydonryan]

Also having this issue. Can we merge this before the rewrite?

[hrhktkbzyy]

I got the same warning here.