Support following fetch redirect responses

[kettanaito]

There are instances where redirect responses to fetch requests aren't being followed:

• Node.js (Undici) fetch doesn't follow redirects when mocked with MSW msw#2266
• fetch mock does not follow redirect nock/nock#2755

Caution

Before fixing this, we need to write compliance tests for different request modules in accordance to how they follow or don't follow redirects. Note that not all request modules may have redirect following built-in. For example, I believe the http module doesn't do that, thus the existence of designated third-party modules just for that functionality.

Roadmap

1. Add failing compliance tests for following redirect responses (can start from fetch). A good start: test: add mock redirect response tests for "axios" and "follow-redirects" #581
2. Analyze existing solutions to learn how they implement redirect response following. Use Undici as an example, I believe it has that built-in.
3. Implement the redirect following.

[kettanaito]

Looks like the failing tests have been added already: #581. We may need more, but this is a good start.

[kettanaito]

Added failing compliance tests for fetch here: #627

Confirm that Undici's fetch does follow redirect responses as described in the expected behavior.

[kettanaito]

Released: v0.35.0 🎉

This has been released in v0.35.0!

• 📄 Release notes
• 📦 npm package

Make sure to always update to the latest version (npm i @mswjs/interceptors@latest) to get the newest features and bug fixes.

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