v21.13.0
Add sum and product to Ghul.Pipes (#228)
Enhancements:
- sum and product total a sequence with no seed argument, over int,
long, double, decimal and bigint - The total of an empty source is zero or one rather than an absent
value, so it needs no unwrapping
Co-authored-by: ghul-coder[bot] <286450068+ghul-coder[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 5 noreply@anthropic.com