spyne.model.complex.XmlAttribute issue

[minafarouk]

I am trying to upgrade spyne from 2.10.9 to 2.13.16 but I got error: "TypeError: __new__() got an unexpected keyword argument 'attribute_of' " for

class AVPairList(ComplexModel):
    AVPair = String(max_occurs='unbounded')
    Name = XmlAttribute(String, attribute_of='AVPair')

[gopackgo90]

attribute_of was removed in 2.13.3-alpha, see 2a483f3.