relationship-generator 1.2.0

Stepparents' children: with stepparents and siblings, a parent and a stepparent have children together (half-siblings born during the union), and the stepparent's own children by an earlier union are the new role stepsibling (family::stepsiblings()). A stepparent's union now begins after the parents' last child together and before the anchor is 18. A child living with a stepparent may live with the stepparent's children. Default output is unchanged; output with stepparents on changes.