update: update VWO SmartCode to version 2.1

[zeeshan-vwo]

This PR updates the VWO SmartCode in the project to version 2.1, replacing the outdated version to ensure compatibility with VWO’s latest features and improvements. The update is backward-compatible, with testing successfully completed in a local environment. No new test cases are required.

Testing

Include any additional information about the testing you have completed to
ensure your changes behave as expected. For a speedy review, please check
any of the tasks you completed below during your testing.

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [If destination is already live] Tested for backward compatibility of destination. Note: New required fields are a breaking change.
• [Segmenters] Tested in the staging environment
• [Segmenters] [If applicable for this change] Tested for regression with Hadron.

[joe-ayoub-segment]

Thanks for raising this PR @zeeshan-vwo .
Can you please add proof of testing?
Also would it be possible to format the new code so that it is easier to compare?

[zeeshan-vwo]

Hi @joe-ayoub-segment,
We have updated the code as per request.

New unit tests are not required.

Please find the screenshot of the tests below:

[joe-ayoub-segment]

hi @zeeshan-vwo thank you - I should have been clearer. It's OK that there's no unit tests, however I was asking if there's a way to demonstrate that this change won't break anything for customers who are already using the Integration.
If you're 100% confident then i can go ahead and deploy this early next week.

[zeeshan-vwo]

Hi @joe-ayoub-segment, our team has already tested it in the existing integrations. You can go ahead and merge the change.

[joe-ayoub-segment]

hi @zeeshan-vwo there are some failing CI checks

[zeeshan-vwo]

hi @joe-ayoub-segment I have fixed the missing declarations and type check, now it will work in node environment as well.