Server tests failed with Node.js 16

[Farfurix]

Found in https://travis-ci.com/github/testcafe-build-bot/testcafe/jobs/500074387.

module.createRequireFromPath is removed from Node.js v16 after deprecation (v12) (nodejs/node#37201)
Up to v16 we used only this method (src/api/test-controller/execution-context.js):

function createRequire (filename) {
    //Deprecated since: Node v12.2.0
    if (Module.createRequireFromPath)
        return Module.createRequireFromPath(filename);

    if (Module.createRequire) // Reachable only in v16+
        return Module.createRequire(filename);

module.createRequire throws error with the '' filename argument:

> const module = require('module')
undefined
> module.createRequire('')
Uncaught:
TypeError [ERR_INVALID_ARG_VALUE]: The argument 'filename' must be a file URL object, file URL string, or absolute path string. Received ''
    at new NodeError (node:internal/errors:329:5)
    at Function.createRequire (node:internal/modules/cjs/loader:1189:13)
    at REPL22:1:8
    at Script.runInThisContext (node:vm:131:12)
    at REPLServer.defaultEval (node:repl:522:29)
    at bound (node:domain:416:15)
    at REPLServer.runBound [as eval] (node:domain:427:12)
    at REPLServer.onLine (node:repl:844:10)
    at REPLServer.emit (node:events:381:22)
    at REPLServer.emit (node:domain:470:12) {
  code: 'ERR_INVALID_ARG_VALUE'
}