title: rest framework swagger 'AutoSchema' object has no attribute get_link
body: <p>I am trying to browse the api documentation of rest framework swagger. but getting error AttributeError: 'AutoSchema' object has no attribute 'get_link</p>
  
  <p>I have used django rest framework swagger. but not able to browse the documentation.</p>
  
  <pre><code>from django.contrib import admin
  from django.urls import path, include
  from rest_framework_swagger.views import get_swagger_view
  
  schema_view = get_swagger_view(title='API')
  
  urlpatterns = [
      path('admin/', admin.site.urls),
      path('api/', include('auth.urls')),
      path('docs/', schema_view),
  ]
  </code></pre>