@stdlib/assert-is-square-triangular-number (npm): Test if a value is a square triangular number.
Keywords: stdlib|stdassert|assertion|assert|utilities|utility|utils|util|number|numeric|triangular|triangle|binomial|binomcoef|square|is|istriangular|issquare|type|check|valid|validate|test|primitive|object|javascript|node|node-js|nodejs