Feature/disable process listener for programattic api

[swrdfish]

Adds flag to disable process-listener while using programatic api.
Required when users want to have control over error reporting.

Usage

const clientWithoutListner = Nightwatch.createClient({
    timeout: 500,
    useAsync: false,
    output: false,
    silent: false,
    headless: true,
    output_folder: 'output',
    globals: {
        testGlobal: 'one'
    },
    disable_process_listener: true
})

[github-actions]

Status

• ❌ No modified files found in the types directory.
  Please make sure to include types for any changes you have made. Thank you!.

[gravityvi]

Should we link the issue that this PR is trying to solve?

[swrdfish]

Created an issue and linked it.