🔓📊 Relax type hint of RankBasedEvaluator's metrics/metrics_kwargs parameter pair to match make_many

[mberr]

This is a small PR to relax the type hint the metric/metric_kwargs parameter-pair of RankBasedEvaluator.__init__ to the one of ClassResolver.make_many.

In particular this indicates that you can also pass a single hint such as

evaluator = RankBasedEvaluator(
  metrics="hits_at_k",
  metric_kwargs=dict(k=50),
)

or use "broadcasting" such as

evaluator = RankBasedEvaluator(
  metrics="hits_at_k",
  metric_kwargs=[dict(k=k) for k in (32, 64, 128)],
)