Targets with enumerable inputs

[adamralph]

Target(
    "echo",
    ForEach(1, 2, 3),
    number => Console.Out.WriteLineAsync(number.ToString()));

var foos = new[] { "a", "b" };
var bars = new[] { 1, 2 };

Target(
    "combo",
    foos.SelectMany(foo => bars.Select(bar => new { foo, bar })),
    o => Console.Out.WriteLineAsync($"{o.foo},{o.bar}"));