Upgrade the reference

FlutterCodeGenerator.csproj

@@ -15,7 +15,7 @@
 	</ItemGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="WingRpcSDK" Version="1.0.0.2" />
+	  <PackageReference Include="WingRpcSDK" Version="1.0.0.3" />
 	</ItemGroup>
 
 </Project>