[Fix] return concrete Dictionary instead of IDictionary for perf (SonarCloud CA1859)

Bump ReqIFSharp to 10.1.1 and ReqIFSharp.Extensions to 5.2.1.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BPACqKBdKLEnEy7h4LASBj

Author: samatstarion

ReqIFSharp.Extensions/ReqIFSharp.Extensions.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
       <TargetFramework>netstandard2.0</TargetFramework>
-      <Version>5.2.0</Version>
+      <Version>5.2.1</Version>
       <LangVersion>12.0</LangVersion>
       <Title>ReqIFSharp.Extensions</Title>
       <Description>A .NET library that provides extenions and services to operate on ReqIF documents.</Description>
@@ -19,7 +19,7 @@
       <GenerateDocumentationFile>true</GenerateDocumentationFile>
       <GenerateSBOM>true</GenerateSBOM>
       <PackageReleaseNotes>
-          - [Update] to reqifsharp version 10.1.0
+          - [Update] to reqifsharp version 10.1.1
       </PackageReleaseNotes>
       <PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>

ReqIFSharp.Tests/NamespaceRetentionTestFixture.cs

@@ -279,7 +279,7 @@ private static List<IDictionary<string, string>> ExtractArchiveRootAttributes(St
         /// <summary>
         /// Collects the union of namespace declarations (<c>xmlns</c> / <c>xmlns:prefix</c>) across the supplied documents.
         /// </summary>
-        private static IDictionary<string, string> UnionNamespaceDeclarations(IEnumerable<IDictionary<string, string>> documents)
+        private static Dictionary<string, string> UnionNamespaceDeclarations(IEnumerable<IDictionary<string, string>> documents)
         {
             var union = new Dictionary<string, string>();
 
@@ -301,7 +301,7 @@ private static IDictionary<string, string> UnionNamespaceDeclarations(IEnumerabl
         /// Reads the attributes declared on the <c>REQ-IF</c> root element of a serialized document, keyed by
         /// their qualified name (e.g. <c>xmlns</c>, <c>xmlns:configuration</c>, <c>xsi:schemaLocation</c>).
         /// </summary>
-        private static IDictionary<string, string> ExtractRootAttributes(Stream stream)
+        private static Dictionary<string, string> ExtractRootAttributes(Stream stream)
         {
             if (stream.CanSeek)
             {

ReqIFSharp/ReqIFSharp.csproj

@@ -4,7 +4,7 @@
 
     <PropertyGroup>
         <TargetFramework>netstandard2.0</TargetFramework>
-        <Version>10.1.0</Version>
+        <Version>10.1.1</Version>
         <LangVersion>12.0</LangVersion>
         <Title>ReqIFSharp</Title>
         <Description>A .NET library to deserialize (read) and serialize (write) OMG ReqIF documents.</Description>
@@ -21,9 +21,7 @@
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
         <GenerateSBOM>true</GenerateSBOM>
         <PackageReleaseNotes>
-            - [Update] lower Microsoft.Extensions.Logging.Abstractions floor to 6.0.0; fixes #77
-            - [Add] uml-like metadata decorators on the model; fixes #27
-            - [Fix] retain namespaces and root attributes on round-trip; fixes #44
+            - [Update] dependencies
         </PackageReleaseNotes>
         <PackageReadmeFile>README.md</PackageReadmeFile>
     </PropertyGroup>