When a reqif file is deserialized to a ReqIF object and then serialized to a new destination file, the namespaces should be retained

[samatstariongroup]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have verified that I am running the latest version of the ReqIFSharp
• [x] I have searched open and closed issues to ensure it has not already been reported

Description

When a reqif file is deserialized to a ReqIF object and then serialized to a new destination file, the namespaces should be retained

Steps to Reproduce

1. deserialize a reqif file to ReqIF object that contains custom namespaces
2. update content of ReqIF object
3. serialize content to new destination (so not overwriting source file) and notice that the declared namespaces are not complete

System Configuration

• ReqIFSharp version:
  • [x] ReqIFSharp: 5.0.2