Pack an extension without .pem key. about crx

[KR1470R]

i found out the way how to fix that.
we can generate the private key just before passing it to the ChromeExtension instance.

const crypto = require("crypto");
const fs = require("fs");

const private_key_path = "/foo/bar/key.pem";

const private_key = crypto.generateKeyPairSync("rsa", {
  modulusLength: 2048,
  privateKeyEncoding: {
    type: "pkcs8",
    format: "pem",
  },
}).privateKey;

fs.writeFileSync(private_key_path, private_key);

const crx = new ChromeExtension({
  codebase: "http://localhost:8000/extension.crx",
  privateKey: private_key_path,
});

but that's some weird why this feature is not built-in for the crx lib.
please, use my solution to implement the feature.