v2.0.0 Release

[mkenney]

Public API syntax updated to use generics syntax.

syntax example:

intVal := cast.To[int]("8.31")      // 8 (int)
intVal := cast.To[int]("Hi!")       // 0 (int)
intVal, err := cast.ToE[int]("Hi!") // 0, unable to cast "Hi!" of type string to int (int, error)