Is assertObjectMatch too type-strict?

**Is your feature request related to a problem? Please describe.**

If you have two typed objects, `actual` and `expect`, of the same type, `assertObjectMatch` doesn't let you use the expect object:

```ts
import { assertObjectMatch } from '@std/assert';

interface FirstLast {
first: string
last: string
}

Deno.test('assertObjectMatch', () => {
const expected: FirstLast = {
first: 'John',
last: 'Doe',
};

const actual = expected;

// passes
assertObjectMatch(actual, {
first: 'John',
last: 'Doe',
});

// fails because `expected` is too typed now?
assertObjectMatch(actual, expected);
// Argument of type 'FirstLast' is not assignable to parameter of type 'Record'.
// Index signature for type 'string' is missing in type 'FirstLast'.

// casting is ugly:
assertObjectMatch(actual, expected as unknown as Record);
});
```

**Describe the solution you'd like**

No error when passing expected objects whose type matches that of the actual object.

**Describe alternatives you've considered**

[Asked on Discord](https://discord.com/channels/684898665143206084/1330481223507640390/1330481223507640390) ~a week ago, no replies yet.