Add FinalizationRegistry

[yisibl]

Describe the feature

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/FinalizationRegistry#browser_compatibility

Additional information

• Would you be willing to help implement this feature?

[ascorbic]

We do actually have that in the data, but we're not currently displaying JS builtins in the site. See here https://github.com/unjs/runtime-compat/blob/main/packages/runtime-compat-data/data.json

[ascorbic]

I've added #105 to track displaying all of the data for builtins

[yisibl]

I'm curious, how do you test for support of an API in these runtimes?

[ascorbic]

There's some info in the README, but tl;dr it uses the tests from mdn-bcd-collector