[Python-modules-team] Bug#903525: python3-dropbox fails to install with Python 3.7 as supported version

[Adrian Bunk]

Package: python3-dropbox
Version: 8.7.1-1
Severity: grave
Control: block 902788 by -1

Setting up python3-dropbox (8.7.1-1) ...
  File "/usr/lib/python3/dist-packages/dropbox/base.py", line 10
    async,
        ^
SyntaxError: invalid syntax

  File "/usr/lib/python3/dist-packages/dropbox/base_team.py", line 10
    async,
        ^
SyntaxError: invalid syntax

  File "/usr/lib/python3/dist-packages/dropbox/files.py", line 21
    async,
        ^
SyntaxError: invalid syntax

  File "/usr/lib/python3/dist-packages/dropbox/sharing.py", line 21
    async,
        ^
SyntaxError: invalid syntax

  File "/usr/lib/python3/dist-packages/dropbox/team.py", line 17
    async,
        ^
SyntaxError: invalid syntax

dpkg: error processing package python3-dropbox (--configure):
 installed python3-dropbox package post-installation script subprocess returned