feat: Adding no_trend arg to BaseHandler.qdm_bc()

As requested by @grantbuster, to qdm_bc() can pass along a 'no_trend'
option to QDM correction.

sup3r/preprocessing/data_handling/base.py

@@ -1331,7 +1331,8 @@ def qdm_bc(self,
  bc_files,
  reference_feature,
  relative=True,
- threshold=0.1):
+ threshold=0.1,
+ no_trend=False):
  """Bias Correction using Quantile Delta Mapping
 
  Bias correct this DataHandler's data with Quantile Delta Mapping. The
@@ -1361,6 +1362,15 @@ def qdm_bc(self,
  Nearest neighbor euclidean distance threshold. If the DataHandler
  coordinates are more than this value away from the bias correction
  lat/lon, an error is raised.
+ no_trend: bool, default=False
+ An option to ignore the trend component of the correction, thus
+ resulting in an ordinary Quantile Mapping, i.e. corrects the bias
+ by comparing the distributions of the biased dataset with a
+ reference datasets. See ``params_mf`` of
+ :class:`rex.utilities.bc_utils.QuantileDeltaMapping`.
+ Note that this assumes that "bias_{feature}_params"
+ (``params_mh``) is the data distribution representative for the
+ target data.
  """
 
  if isinstance(bc_files, str):
@@ -1378,7 +1388,8 @@ def qdm_bc(self,
  feature,
  bias_fp=fp,
  threshold=threshold,
- relative=relative)
+ relative=relative,
+ no_trend=no_trend)
  completed.append(feature)