M_210 missing L_SPO

[Timallbr]

Just needed to add

new L_SPO(this) { ReqDes = RequirementDesignator.Optional, MaxOccurs = 999999 },

[olmelabs]

Sorry, this project is not actively maintained, you can always fork it

[illya-peshkov]

@Timallbr, could you please register isse here https://github.com/denis-peshkov/Cross.EdiEngine/issues