ECONNREFUSED with Node 17

[eight04]

Quote from mozilla/web-ext#2331 (comment):

chrome-launcher/src/chrome-launcher.ts

Line 316 in 4cfe245

const client = net.createConnection(this.port!);

This used to connect to 127.0.0.1 but node@17 prefers IPv6 (nodejs/node#40537). However, Chrome doesn't listen on IPv6 so it never connects. A simple fix:

-- const client = net.createConnection(this.port);
++ const client = net.createConnection(this.port, '127.0.0.1');