render: json: include locations for range

closes #43

capa/render/__init__.py

@@ -1,6 +1,7 @@
 import json
 import six
 
+import capa.rules
 import capa.engine
 
 
@@ -150,6 +151,9 @@ def convert_match_to_result_document(rules, capabilities, result):
     if isinstance(result.statement, capa.features.Feature):
         if bool(result.success):
             doc['locations'] = result.locations
+    elif isinstance(result.statement, capa.rules.Range):
+        if bool(result.success):
+            doc['locations'] = result.locations
 
     # if we have a `match` statement, then we're referencing another rule.
     # this could an external rule (written by a human), or