@types/k6 Fix runtime error when grcp Stream experimental

[jyeros]

If try to run a k6 script with the steam event types like:

import grpc from "k6/experimental/grpc";

const stream = new grpc.Stream(...);

stream.on(grpc.StreamEvent.Data, (d) => {
  console.log(JSON.stringify(d));
});

I am getting a runtime error ERRO[0000] TypeError: Cannot read property 'Data' of undefined. It looks like the StreamEvent enum is not defined. But, it works if we run it like:

import grpc from "k6/experimental/grpc";

const stream = new grpc.Stream(...);

-stream.on(grpc.StreamEvent.Data, (d) => {
+stream.on('data', (d) => {
  console.log(JSON.stringify(d));
});

So, changing StreamEvent from enum to union of string literal types works in runtime and enforce types.

[CLAassistant]

All committers have signed the CLA.

[olegbespalov]

Hi @jyeros !

Changes look good 👍

One thing could you please point them directly to the upstream (https://github.com/DefinitelyTyped/DefinitelyTyped/)?

[jyeros]

DefinitelyTyped#66340, I am not sure if you want me to do version bump

[jyeros]

Merged on base repo DefinitelyTyped#66340