fix #303 & #301 (#309)

Co-authored-by: GFJ138 <sebastien.dementen@engie.com>

Author: sdementen

django_plotly_dash/dash_wrapper.py

@@ -586,8 +586,6 @@ def clientside_callback(self, clientside_function, output, inputs=[], state=[]):
 
         if isinstance(output, (list, tuple)):
             fixed_outputs = [self._fix_callback_item(x) for x in output]
-            # Temporary check; can be removed once the library has been extended
-            raise NotImplementedError("django-plotly-dash cannot handle multiple callback outputs at present")
         else:
             fixed_outputs = self._fix_callback_item(output)