Function signature update

stantargets 0.0.5

• Update the signatures of most user-side functions to accommodate changes from cmdstanr 0.2.0 to 0.5.0 (ropensci/targets#884, @stuvet).

from stantargets 0.0.4:

• Support the repository argument for targets >= 0.11.0.
• Append a new .dataset_id column to target outputs to aid in model comparisons across the same datasets.