bigint literal creates invalid type declaration

[scottbessler]

With the following setup:

tsgo compiled from commit 2aa0eb5d92ba30e24710a5fa95a8781ae8ef285a

tsconfig.json

{
    "compilerOptions": {
        "target": "ES2020",
        "outDir": "./dist",
        "declaration": true,
    }
}

bug.ts

export const X = 0n;

The emitted declarations are invalid:

> rm -rf dist && tsgo && cat dist/bug.d.ts
export declare const X = ;