Address #6624, adding 'new' keyword to page-unload-barrier Promise

[rob4629]

Purpose

Describe the problem you want to address or the feature you want to implement.
Address #6624, where exception is thrown as detailed by @danieltroger here.

Approach

Describe how your changes address the issue or implement the desired functionality in as much detail as possible.
Add new keyword to Promise creation, for waitForFileDownload in page-unload-barrier.ts

References

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Pre-Merge TODO

• Write tests for your proposed changes
• Make sure that existing tests do not fail

[Farfurix]

@rob4629

Thank you for your contribution to TestCafe. We will review this PR.

[rob4629]

I didn't add any new tests, as I felt this change would be covered by test/client/fixtures/core/page-unload-barrier.js

[miherlosev]

Check it in context of #6736

[rob4629]

Check it in context of #6736

👋🏻 @miherlosev, was this comment for me? I've tried updating the Safari version in test/function/config.js but not really sure what Safari tests need to be updated.

[miherlosev]

Hi @rob4629,

It was a comment for the team members. We can merge this PR and release a new alpha version if you need a version with the fix faster.

[rob4629]

Thanks for the offer. I'm good to wait until the next planned release

[danieltroger]

Same, the yarn patch I made still works 👍