It seems Python 3.5 is no longer supported for Django master branch

[wiliamsouza]

==========================                                                                                                                                                                                       
Unsupported Python version                                                                                                                                                                                       
==========================                                                                                                                                                                                       
                                                                                                                                                                                                                 
This version of Django requires Python 3.6, but you're trying to                                                                                                                                                 
install it on Python 3.5.                                                                                                                                                                                        
                                                                                                                                                                                                                 
This may be because you are using a version of pip that doesn't                                                                                                                                                  
understand the python_requires classifier. Make sure you                                                                                                                                                         
have pip >= 9.0 and setuptools >= 24.2, then try again:                                                                                                                                                         
                                                                                                                                                                                                                 
    $ python -m pip install --upgrade pip setuptools                                                                                                                                                            
    $ python -m pip install django                                                                                                                                                                               
                                                                                                                                                                                                                 
This will install the latest version of Django which works on your                                                                                                                                               
version of Python. If you can't upgrade your pip (or Python), request                                                                                                                                            
an older version of Django:                                                                                                                                                                                      
                                                                                                                                                                                                                 
    $ python -m pip install "django<2"          

[auvipy]

that's for django 3.0, we should use allow_failure for django master.