Add Seq.collect(Collector, Collector, ..., Collector) for convenience

[lukaseder]

Type inference tends not to work very well when using Tuple.collectors(). A type witness is often needed as can be seen in this post: https://blog.jooq.org/2019/02/11/lesser-known-joo%CE%BB-features-useful-collectors

// Unfortunately, Java's type inference might need
// a little help here
var percentiles =
Stream.of(1, 2, 3, 4, 10, 9, 3, 3).collect(
  Tuple.collectors(
    Agg.<Integer>percentile(0.0),
    Agg.<Integer>percentile(0.25),
    Agg.<Integer>percentile(0.5),
    Agg.<Integer>percentile(0.75),
    Agg.<Integer>percentile(1.0)
  )
);

System.out.println(percentiles);

Wrapping the collectors explicitly shouldn't be necessary, really. It would be nice to have overloaded collect() methods that allow for collecting into a tuple directly:

// Unfortunately, Java's type inference might need
// a little help here
var percentiles =
Stream.of(1, 2, 3, 4, 10, 9, 3, 3).collect(
    Agg.percentile(0.0),
    Agg.percentile(0.25),
    Agg.percentile(0.5),
    Agg.percentile(0.75),
    Agg.percentile(1.0)
);

System.out.println(percentiles);

[lukaseder]

This feature is already implemented :-)