Fix list view

[todd-dembrey]

Was receiving the following error. The offending line of code hadn't been touched since 2009. Please see PR for update and tests.

  File "/home/todd/VirtualEnv/feincms-articles/lib/python3.5/site-packages/taggit/views.py", line 20, in tagged_object_list
    return ListView.as_view(request, qs, **kwargs)
TypeError: as_view() takes 1 positional argument but 3 were given

[codecov-io]

Current coverage is 0.29% (diff: 0.00%)

Merging #444 into master will decrease coverage by <.01%

@@            master      #444   diff @@
========================================
  Files            8         8          
  Lines          666       683    +17   
  Methods          0         0          
  Messages         0         0          
  Branches       110       111     +1   
========================================
  Hits             2         2          
- Misses         661       678    +17   
  Partials         3         3          

Powered by Codecov. Last update 089f633...223b48a

[frewsxcv]

Thanks!