Release v4.86.0

Added

• Guards can opt in to strict operand checking for Contains, by setting guards: { strictOperands: true } on the InteractionScope context. In strict mode, a null or missing field evaluates to false, and the fallback runs. A collection, number, boolean, object or other non-string operand is reported as unevaluable, so neither the command nor the fallback runs. Without the setting, Contains behaves exactly as before. (#276)