Strongly typed "LINQ to Customer.io" implementation for API broadcasts

[vegardlarsen]

await _customerIo.Campaign(17)
    .Where(broadcast => broadcast.InSegment(23))
    .Where(broadcast => broadcast.Customer.Interest == "roadrunners")
    .TriggerAsync(new { data = "foo" });

This would give us type safety (we already know what all the customer attributes are, but it would require adding a generic type argument to our entire class).

Everything in the API syntax, should be possible to implement using expression trees, but this may turn out to be a lot more work than required.

See:

• API triggered data format
• Broadcast trigger