Uses poetry instead of setup.py

.travis.yml

@@ -30,8 +30,8 @@ install:
   - pip install -q django==$DJANGO
   - pip install -r requirements.txt
   - pip install pytest --upgrade
-  - pip install pytest-django codecov sphinx
-  - python setup.py install
+  - pip install pytest-django codecov sphinx poetry
+  - python poetry install
 
 script:
   - coverage run --source=django_q -m py.test