fix #508

parse settings as single dict for wellmodel

pastas/stressmodels.py

@@ -719,7 +719,7 @@ def __init__(
 
             distances = np.sort(distances)
 
-        if settings is None or isinstance(settings, str):
+        if settings is None or isinstance(settings, str) or isinstance(settings, dict):
             settings = len(stress) * [settings]
 
         # convert stresses to TimeSeries if necessary