mlr3benchmark 0.1.1

• BenchmarkAggr$friedman_test now returns the full test object if only a single measure exists in the object
• Fixed plotting in autoplot.BenchmarkAggr for CD-plots, previously bars were overlapping and giving misleading results.
• BenchmarkAggr is now more flexible in construction. Instead of being forced to name columns task_id and learner_id, instead any name can be used if passed to the respective arguments in the constructor.
• Adds $subset public method to BenchmarkAggr as a thin wrapper around subset for data.table. Returns subsetted data.table.