bigintMissingESNext.types

=== tests/cases/conformance/es2020/bigintMissingESNext.ts ===
declare function test<A, B extends A>(): void;
>test : <A, B extends A>() => void

test<{t?: string}, object>();
>test<{t?: string}, object>() : void
>test : <A, B extends A>() => void
>t : string

test<{t?: string}, bigint>();
>test<{t?: string}, bigint>() : void
>test : <A, B extends A>() => void
>t : string

// no error when bigint is used even when ES2020 lib is not present