[node]: Missing .send() method on child process

[marvinhagemeister]

Deno missing .send() method on child process

A child process in node has a send() method that is missing in deno. Ran into this error when trying to run a jest test. The jest-worker module uses this internally to communicate which each test process.

Steps to reproduce

1. Clone https://github.com/marvinhagemeister/deno-child-process-send-bug
2. Run deno run -A foo.js

Error

error: Uncaught TypeError: child.send is not a function
  child.send({ hello: "world" }); // <- Throws missing methods
        ^
      at file:///project/foo.js:13:7

[bartlomieju]

Related #18265 and #17265

[littledivy]

Fixed in #21490