(json-rpc-streams) NodeJsMessageStream drops longer messages and potentially some sent before and after

index.ts line 32
```typescript
readStream.on("data", (chunk: any) => {
	const str = chunk.toString("utf8");
	const parts = str.trim().split("\n"); // todo improve. Yes, please do!
	for (const p of parts) {
		const obj = JSON.parse(p) as Message;
		this.onMessage(obj);
	}
});
```

This does not work when the message is longer than the chunk.