Update

Author: keller-mark

.coveragerc_omit

@@ -14,4 +14,5 @@ omit =
     src/vitessce/data_utils/multivec.py
     src/vitessce/data_utils/spatialdata_points_zorder.py
     src/vitessce/widget_plugins/demo_plugin.py
-    src/vitessce/widget_plugins/spatial_query.py
+    src/vitessce/widget_plugins/spatial_query.py
+    tests/*.py