`PipeOpUpdateTarget` doesn't work for survival tasks with 2 target columns

[bblodfon]

library(mlr3proba)
#> Loading required package: mlr3
task = tsk('lung')

trgs = task$data(cols = task$target_names)
trgs
#>      time status
#>   1:  306   TRUE
#>   2:  455   TRUE
#>   3: 1010  FALSE
#>   4:  210   TRUE
#>   5:  883   TRUE
#>  ---            
#> 224:  188  FALSE
#> 225:  191  FALSE
#> 226:  105  FALSE
#> 227:  174  FALSE
#> 228:  177  FALSE

trafo_fun = function(x) {
  x$time = ceiling(x$time / 7) # change time from days to weeks
  x
}
trafo_fun(trgs) # works
#>      time status
#>   1:   44   TRUE
#>   2:   65   TRUE
#>   3:  145  FALSE
#>   4:   30   TRUE
#>   5:  127   TRUE
#>  ---            
#> 224:   27  FALSE
#> 225:   28  FALSE
#> 226:   15  FALSE
#> 227:   25  FALSE
#> 228:   26  FALSE

pout = mlr3pipelines:::PipeOpUpdateTarget$new(param_vals = list(trafo = trafo_fun))
pout$train(list(task)) # doesn't work
#> Error in initialize(...): unused argument (target = c("time", "status"))
#> This happened PipeOp update_target's $train()

^{Created on 2023-09-05 with reprex v2.0.2}