Compatibility issue with django 1.11

[omarwllorente]

When upgrading to django 1.11 an error arises: build_attrs() unexpected keyword 'type'.

It happened in other django related software, as you can see:
django-ckeditor/django-ckeditor#375
jazzband/django-sortedm2m#107

It is easily solved by this recoding in widgets.py:

--- /usr/local/lib/python2.7/dist-packages/splitjson/widgets.py.orig    2018-03-07 13:16:58.544426000 +0100
+++ /usr/local/lib/python2.7/dist-packages/splitjson/widgets.py 2018-03-07 13:24:15.904531209 +0100
@@ -23,8 +23,9 @@
         Widget.__init__(self, attrs)

     def _as_text_field(self, name, key, value, is_sub=False):
-        attrs = self.build_attrs(self.attrs, type='text',
-                                 name="%s%s%s" % (name, self.separator, key))
+        attrs = self.build_attrs(self.attrs)
+        attrs['type'] = 'text'
+        attrs['name'] = "%s%s%s" % (name, self.separator, key)
         attrs['value'] = utils.encoding.force_unicode(value)
         attrs['id'] = attrs.get('name', None)
         return u""" <label for="%s">%s:</label>

It would be great if you can update your code to solve the problem. Thanks!

[zahid-arbisoft]

This change must be added to code. @omarwllorente Thank you