Use Portable.BouncyCastle version for .NET Standard

Author: r-brown

NetLicensingClient/NetLicensingClient.csproj

@@ -5,7 +5,7 @@
     <ReleaseVersion>2.x</ReleaseVersion>
     <PackOnBuild>true</PackOnBuild>
     <PackageId>NetLicensingClient-csharp</PackageId>
-    <PackageVersion>2.4.2</PackageVersion>
+    <PackageVersion>2.4.3</PackageVersion>
     <Authors>Labs64 NetLicensing</Authors>
     <Copyright>© 2010 Labs64 GmbH</Copyright>
     <PackageIconUrl>https://netlicensing.io/img/labs64-avatar-200x200.png</PackageIconUrl>
@@ -25,7 +25,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="BouncyCastle" Version="1.8.6.1" />
     <PackageReference Include="System.Security.Cryptography.Xml" Version="4.7.0" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.8.6.7" />
   </ItemGroup>
 </Project>

NetLicensingClient/RestController/NetLicensingAPI.cs

@@ -11,7 +11,6 @@
 using Org.BouncyCastle.Crypto.Parameters;
 using Org.BouncyCastle.OpenSsl;
 using System.Security.Cryptography;
-using System.Security.Cryptography.X509Certificates;
 using System.Security.Cryptography.Xml;
 using System.Xml;