refact: Named argument (#225)

There is no reason why don't be explicit here, which also gives more
freedom in the signature for new methods.

This was an issue implementing PresRat, where there was a confusion with
lat_lon and time.

sup3r/pipeline/forward_pass.py

@@ -1578,7 +1578,7 @@ def bias_correct_source_data(self, data, lat_lon):
                                  feature, idf, method, feature_kwargs))
 
                 data[..., idf] = method(data[..., idf],
-                                        lat_lon,
+                                        lat_lon=lat_lon,
                                         **feature_kwargs)
 
         return data