Replace this with globalThis in top-level prelude

[exzos28]

I am using Metro to build a Service Worker for my web application (created with Expo). And I get an error because this value is undefined here. This piece of code is static and is added to every bundle.

Summary

Provide a standard way of accessing the global this value across environments.

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@robhogan has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[robhogan]

Confirmed globalThis is also supported on iOS Safari >= 12.2, Hermes, and Android JSC, so this LGTM. Thanks @exzos28

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@robhogan merged this pull request in dded99c.