Bug: stiltstation.find(outfmt = 'list') leads to TypeError

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In order to reproduce, run the code:

from icoscp.stilt import stiltstation

stations = stiltstation.find(country="sweden",outfmt='list')

Result:

 /opt/conda/lib/python3.8/site-packages/icoscp/stilt/stiltstation.py in <listcomp>(.0)
    301 def __get_object(stations):
    302 
--> 303     return [StiltStation().get_info(stations[st]) for st in stations.keys()]
    304 
    305 

TypeError: __init__() missing 1 required positional argument: 'st_dict'
)

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Branch: ad_stiltstation_find_outfmt_list_issue71