Fixed boolean parameters not recognized properly as booleans: paramet…

…ers detect_year_range and use_virtual_flows was always interpreted as False.

core/dataprovider.py

@@ -145,6 +145,7 @@ def __init__(self, filename: str = "",
                         found_param_value = self._to_bool(found_param_value)
                     param_value = param_type(found_param_value)
                     self._param_name_to_value[param_name] = param_value
+
                 except ValueError as e:
                     print("Invalid type for required parameter '{}': expected {}, got {}".format(
                         param_name, param_type_to_str[param_type], param_type_to_str[found_param_type]))
@@ -309,6 +310,9 @@ def _to_bool(self, value: Any) -> bool:
             if value.lower() == "true":
                 return True
 
+        if isinstance(value, bool):
+            return value
+
         else:
             return False