Upgrade System.ServiceModel.Primitives to 4.10.3

Author: tmatthey

src/NetMQ/NetMQ.csproj

@@ -39,11 +39,11 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.9.0" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="4.10.3" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' ">
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.9.0" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="4.10.3" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">