Update NodeJS example to work with newest dependencies. Fixes #92

[stfsy]

Fixes the following error when connecting to the emulator with "@google-cloud/tasks": "^5.0.0". It's not an issue with the emulator, but Google modules got updated, and the NodeJS example was out of date.

     TypeError: Channel credentials must be a ChannelCredentials object
      at new ChannelImplementation (node_modules\google-gax\node_modules\@grpc\grpc-js\build\src\channel.js:29:19)
      at new Client (node_modules\google-gax\node_modules\@grpc\grpc-js\build\src\client.js:65:36)
      at new ServiceClientImpl (node_modules\google-gax\node_modules\@grpc\grpc-js\build\src\make-client.js:58:5)
      at GrpcClient.createStub (node_modules\google-gax\build\src\grpc.js:345:22)
      at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

The root cause is that in node_modules\google-gax\node_modules\@grpc\grpc-js\build\src\channel.js:29:19 the credentials object is checked to be an instance of google-gax/ChannelCredentials

However, in the README of this repository, the @grpc/grpc-js library is used to create the CredentialsObject.

import { credentials } from '@grpc/grpc-js';

const client = new CloudTasksClient({
  port: 8123,
  servicePath: 'localhost',
  sslCreds: credentials.createInsecure(),
});

Thus, the check in node_modules\google-gax\node_modules\@grpc\grpc-js\build\src\channel.js:29:19 fails because the given credentials object has a different prototype hierarchy.

I fixed it by using ChannelCredentials from google-gax module. No need to install or pin any dependency versions.

import { ChannelCredentials } from 'google-gax';

const client = new CloudTasksClient({
  port: 8123,
  servicePath: 'localhost',
  sslCreds: ChannelCredentials.createInsecure(),
});

[FezVrasta]

I think this changed again, it's giving me this error even though I have been using google-gax for a few months already

I had to use @grpc/grpc-js now, not after having ran yarn dedupe to ensure a single instance was in my node_modules