Pin django-filter in filtering docs until full compatibility with 2.0.0

Author: ramonsaraiva

docs/filtering.rst

@@ -2,9 +2,9 @@ Filtering
 =========
 
 Graphene integrates with
-`django-filter <https://django-filter.readthedocs.org>`__ to provide
+`django-filter <https://django-filter.readthedocs.io/en/1.1.0/>`__ (< 2.0.0) to provide
 filtering of results. See the `usage
-documentation <https://django-filter.readthedocs.io/en/latest/guide/usage.html#the-filter>`__
+documentation <https://django-filter.readthedocs.io/en/1.1.0/guide/usage.html#the-filter>`__
 for details on the format for ``filter_fields``.
 
 This filtering is automatically available when implementing a ``relay.Node``.
@@ -15,7 +15,7 @@ You will need to install it manually, which can be done as follows:
 .. code:: bash
 
     # You'll need to django-filter
-    pip install django-filter
+    pip install django-filter==1.1.0
 
 Note: The techniques below are demoed in the `cookbook example
 app <https://github.com/graphql-python/graphene-django/tree/master/examples/cookbook>`__.
@@ -26,7 +26,7 @@ Filterable fields
 The ``filter_fields`` parameter is used to specify the fields which can
 be filtered upon. The value specified here is passed directly to
 ``django-filter``, so see the `filtering
-documentation <https://django-filter.readthedocs.io/en/latest/guide/usage.html#the-filter>`__
+documentation <https://django-filter.readthedocs.io/en/1.1.0/guide/usage.html#the-filter>`__
 for full details on the range of options available.
 
 For example:
@@ -127,7 +127,7 @@ create your own ``Filterset`` as follows:
         all_animals = DjangoFilterConnectionField(AnimalNode,
                                                   filterset_class=AnimalFilter)
 
-The context argument is passed on as the `request argument <http://django-filter.readthedocs.io/en/latest/guide/usage.html#request-based-filtering>`__
+The context argument is passed on as the `request argument <http://django-filter.readthedocs.io/en/1.1.0/guide/usage.html#request-based-filtering>`__
 in a ``django_filters.FilterSet`` instance. You can use this to customize your
 filters to be context-dependent. We could modify the ``AnimalFilter`` above to
 pre-filter animals owned by the authenticated user (set in ``context.user``).