Type errors occur when used with browserslist-to-esbuild.

[odanado]

Defining the following tsup.config.ts will result in a type error.

import { defineConfig } from "tsup";
import browserslistToEsbuild from "browserslist-to-esbuild";

defineConfig({
    target: browserslistToEsbuild(),
})

error:

Type 'string[]' is not assignable to type 'Target | Target[] | undefined'.
  Type 'string[]' is not assignable to type 'Target[]'.
    Type 'string' is not assignable to type 'Target'.(2322)

ref: https://www.typescriptlang.org/play/?ssl=2&ssc=1&pln=3&pc=1#code/JYWwDg9gTgLgBAbzgEwKYDNgDtUGEJaYDmcAvnOlBCHAEQwDOArmLQNwBQokscARlQDuDVFAYAbYAxgAVCAFEGfJsHHIKVGrQERhoiVJgBaGBCOolKtew4c0mHPkLAiACgQc4XuDACGUIlQYAC5+IRExSWk5RWVVZFcASgAaDlJEjiA

This is due to tsup's use of the literal type Union.

tsup/src/options.ts

Line 88 in 00188a0

export type Target = BrowserTarget | BrowserTargetWithVersion | EsTarget

Could adding (string & {}) to the type solve this problem?
microsoft/TypeScript#29729 (comment)

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