Merge branch 'formatFix' into 'master'

Fix data format issue

See merge request !13

geomagio/api/ws/data.py

@@ -156,5 +156,5 @@ def get_data(
     timeseries = get_timeseries(data_factory, query)
     # output response
     return format_timeseries(
-        timeseries=timeseries, format=format, elements=query.elements
+        timeseries=timeseries, format=query.format, elements=query.elements
     )