v2.13.1

Fixed

• Fixed some nullability annotations that were incorrectly defined (#953, #955)
• Fixed issue that would dispose a TextReader when creating an XmlReader under certain circumstances (#940)
• Fixed a documentation type (#937)
• Fixed an issue with adding additional children to data parts (#934)
• Replaced some documentation entries that were generic values with helpful comments (#992)
• Fixed a regression in AddDataPartRelationship (#954)

Thanks to the following for their contributions:

@ThomasBarnekow
@sorensenmatias
@lklein53
@lindexi