Plugin is not working without option field

[doron050]

When using the plugin like in the quick start there is an error:

# package csharp
error generating code: 
Unhandled Exception:
System.Text.Json.JsonException: ExpectedJsonTokens Path: $ | LineNumber: 0 | BytePositionInLine: 0.
 ---> System.Text.Json.JsonReaderException: ExpectedJsonTokens LineNumber: 0 | BytePositionInLine: 0.
   at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& , ExceptionResource , Byte , ReadOnlySpan`1 )
   at System.Text.Json.Utf8JsonReader.Read()
   at System.Text.Json.Serialization.JsonConverter`1[[SqlcGenCsharp.RawOptions, PluginOptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].ReadCore(Utf8JsonReader& , JsonSerializerOptions , ReadStack& )
   Exception_EndOfInnerExceptionStack
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& , JsonReaderException )
   at System.Text.Json.Serialization.JsonConverter`1[[SqlcGenCsharp.RawOptions, PluginOptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].ReadCore(Utf8JsonReader& , JsonSerializerOptions , ReadStack& )
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1[[SqlcGenCsharp.RawOptions, PluginOptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].Deserialize(Utf8JsonReader& , ReadStack& )
   at System.Text.Json.JsonSerializer.ReadFromSpan[RawOptions](ReadOnlySpan`1 , JsonTypeInfo`1 , Nullable`1 )
   at System.Text.Json.JsonSerializer.ReadFromSpan[RawOptions](ReadOnlySpan`1 , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.Deserialize[RawOptions](String , JsonSerializerOptions )
   at SqlcGenCsharp.Options..ctor(GenerateRequest generateRequest)
   at SqlcGenCsharp.CodeGenerator.InitGenerators(GenerateRequest generateRequest)
   at SqlcGenCsharp.CodeGenerator.Generate(GenerateRequest generateRequest)
   at SqlcGenCsharp.PluginRunner.Run()
   at Program.<Main>$(String[] args)

enable the plugin to work without an option field (like the quick guide suggest)