Build: only reference Microsoft.Bcl.Memory on .NET Standard

This will help to get rid of a transitive dependency.

Author: ForNeVeR

TruePath/TruePath.csproj

@@ -18,6 +18,6 @@ SPDX-License-Identifier: MIT
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="Microsoft.Bcl.Memory" Version="10.0.5" />
+        <PackageReference Include="Microsoft.Bcl.Memory" Version="10.0.5" Condition="'$(TargetFramework)' == 'netstandard2.0'" />
     </ItemGroup>
 </Project>