Lack of support for const enum in typescript

[cortopy]

• Rollup Plugin Name: typescript
• Rollup Plugin Version: 4.1.2
• Rollup Version: 2.17.1
• Operating System (or Browser): Linux
• Node Version: 12

How Do We Reproduce?

In a ts file, I have an enum like this:

export const enum PATH {
  ABOUT = "/about",
  CATALOGUE = "/books",
  // ....
}

I've been using @rollup/plugin-typescript version 2.17.1 until today and it was working fine.

However, when I just tried to upgrade to 4.1.2, I get the following error:

Error: 'PATH' is not exported by src/lib/navRoutes.ts, imported by src/components/atoms/icon/NavIcon.svelte

The weird thing is that if I convert the enum to a normal object, it works. I've tested it with other enums and I have the same result

Expected Behavior

The build succeeds

Actual Behavior

Typescript build fails

[shellscape]

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Please add a reproduction and we'll be happy to triage further.

[ShaMan123]

https://replit.com/@ShaMan123/rollup-plugin-repro-ts-enum?v=1