BUG: missing indexing in DataHandlerMixedSamplingWithFilter

In DataHandlerMixedSamplingWithFilter there is no indexing for the interpolation method.

data = self.interpolate(data, dim=self.time_dim, method=self.interpolation_method,
                        limit=self.interpolation_limit[ind])

Change to

data = self.interpolate(data, dim=self.time_dim, method=self.interpolation_method[ind],
                        limit=self.interpolation_limit[ind])