[Bug]: ESM import of @fullhuman/postcss-purgecss has incorrect TypeScript type

[mdmower]

Describe the bug

When I set my project to ESM ("type": "module" in package.json), the import of @fullhuman/postcss-purgecss in my build script has the wrong type. I have to coerce the type with (purgecss as unknown as typeof purgecss.default)({...}) for the type check to pass.

To Reproduce

I've created a minimal example at https://github.com/mdmower/purgecss-export/ to demonstrate this issue. After cloning the project and running npm install, you can run npm run check-types to see the type error (it's also visible in VSCode, see file build/build.ts).

Expected Behavior

ESM import type of @fullhuman/postcss-purgecss should be a function.

Environment

Debian 12 Node.js 20.15.0 npm 10.8.1

    "@fullhuman/postcss-purgecss": "^6.0.0",
    "@types/node": "^20.14.9",
    "css-loader": "^7.1.2",
    "postcss-loader": "^8.1.1",
    "style-loader": "^4.0.0",
    "ts-loader": "^9.5.1",
    "tsx": "^4.16.0",
    "typescript": "^5.5.2",
    "webpack": "^5.92.1"

Add any other context about the problem here

Potentially useful resources:

• https://arethetypeswrong.github.io/?p=%40fullhuman%2Fpostcss-purgecss%406.0.0
• https://github.com/microsoft/TypeScript/issues/52086

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[Ffloriel]

Thanks for looking into it. At the moment, the "fix" would be to use the default export with:

      purgecss.default({
        content: ["src/index.ts"],
      }),

I will add a named export for purgeCSSPlugin, so that in the future it will be imported with

import { purgeCSSPlugin } from "@fullhuman/postcss-purgecss"

[brybrant]

When will next package version be published? I need this