[APIView][js-parser] protected properties showing as public

An example can be seen in storage-blob:

APIView shows as:

```ts
export class BlobClient extends StorageClient {
blobClientConfig?: BlobClientConfig;
}
```

[link](https://spa.apiview.dev/review/481422771b7d4e2cb37cc95fc00faba2?activeApiRevisionId=74dcdfe47c754ad4b36712b09c9e66ed&diffApiRevisionId=5cd629caf3264daeb36b4ff1415b79ba&diffStyle=trees&nId=@azure%2Fstorage-blob!BlobClient%23blobClientConfig:member)

But it is actually protected as shown in the codebase: [link](https://github.com/Azure/azure-sdk-for-js/blob/5b5994701c8b713b92cc3690fb3fcaa4c22e8474/sdk/storage/storage-blob/src/Clients.ts#L962)

It's possible that the parser is dropping `protected` but I'd expect to continue to see protected keyword in APIView