Improve NRT annotations and update Foundatio to 13.0.0-beta6.2

- Add [DisallowNull] to connection string options property

Author: niemyjski

src/Foundatio.Minio/Foundatio.Minio.csproj

@@ -6,7 +6,7 @@
   <ItemGroup>
     <PackageReference Include="Minio" Version="7.0.0" />
 
-    <PackageReference Include="Foundatio" Version="13.0.0-beta6" Condition="'$(ReferenceFoundatioSource)' == '' OR '$(ReferenceFoundatioSource)' == 'false'" />
+    <PackageReference Include="Foundatio" Version="13.0.0-beta6.2" Condition="'$(ReferenceFoundatioSource)' == '' OR '$(ReferenceFoundatioSource)' == 'false'" />
     <ProjectReference Include="..\..\..\Foundatio\src\Foundatio\Foundatio.csproj" Condition="'$(ReferenceFoundatioSource)' == 'true'" />
   </ItemGroup>
 </Project>

src/Foundatio.Minio/Storage/MinioFileStorageOptions.cs

@@ -10,10 +10,9 @@ public class MinioFileStorageOptions : SharedOptions
 
 public class MinioFileStorageOptionsBuilder : SharedOptionsBuilder<MinioFileStorageOptions, MinioFileStorageOptionsBuilder>
 {
-    public MinioFileStorageOptionsBuilder ConnectionString(string connectionString)
+    public MinioFileStorageOptionsBuilder ConnectionString(string? connectionString)
     {
-        ArgumentException.ThrowIfNullOrEmpty(connectionString);
-        Target.ConnectionString = connectionString;
+        Target.ConnectionString = String.IsNullOrEmpty(connectionString) ? null : connectionString;
         return this;
     }