Support process.chdir.disabled

[mischnic]

On more recent Node versions process.chdir.disabled is true in Workers (because that function isn't supported in worker threads). It was previously not copied over to the chdir wrapper.

Example (this issue causes an exception on Windows because moxystudio/node-cross-spawn#132 need to check for chdir.disabled):

// x.js
const {Worker} = require("worker_threads");
new Worker("./y.js");


// y.js
require('graceful-fs');
console.log(process.chdir.disabled, "should be true in a Worker"); // prints "undefined should ...."

const spawn = require('cross-spawn');
spawn('ps', [], {cwd: process.cwd()}) // this call fails on windows