added default value for inSR=4326 to fix queries to arcgis server

[brendancol]

when querying a map service layer and sending in the envelope geometry:

{"xmin":90,"ymin":0,"xmax":112.5,"ymax":21.94304553343818,"spatialReference":{"wkid":4326}}

The inSR parameter also needed to be set to 4326 to successfully return features. My guess is that this is a quirk in the arcgis server vs. arcgis online and that agol will successfully read the spatialReference from the envelope json itself, but that ArcGIS Server won't.

[patrickarlt]

This is actually already fixed by d0dc744 when it was reported in #283.

The better way to fix it is to add inSr to the params when you add the bounds. This will be released in beta 6 (which should hopefully be out later this week)