Unable to use path in output_path

[terminalkitten]

When using multiple urls, if given a path instead of filename, will result in error

 await pdfgen.from_url(['http://example.com/1', 'http://example.com/2'], 'files/example.pdf', options=options)

 [Errno 2] No such file or directory: '/var/folders/rj/ckmfygyj6sgc_4qd3mg0pq_c0000gn/T/files/example.pdf-0-0wca2ipo.pdf'

The prefix set on NamedTemporaryFile is incorrect and wil result in file not found error.

def _get_output_path(self, path, i, count):
    if count > 1:
        return NamedTemporaryFile(prefix=f'{path}-{i}-', suffix='.pdf', delete=False).name
    else:
        return path

So I think the NamedTemporaryFile should use tail of the path as prefix and suffix.