Bug#903637: python3-seqdiag is not working with python3.7

[Michal Arbet]

Package: python3-seqdiag
Version: 0.9.5+dfsg-1


Dear Maintainer,

When package is installing , these errors appears below  .. :


Setting up python3-seqdiag (0.9.5+dfsg-1) ...
  File "/usr/lib/python3/dist-packages/seqdiag/drawer.py", line 106
    if edge.async:
                ^
SyntaxError: invalid syntax

  File "/usr/lib/python3/dist-packages/seqdiag/elements.py", line 124
    self.async = False
             ^
SyntaxError: invalid syntax




These is caused because of python 3.7 where async is reserved python3.7
keyword.
Please , could you fix and upload new revision ?


Thanks,
Michal Arbet