feat: added more tests

Author: JUSTIVE

tests/object.test.ts

@@ -117,6 +117,9 @@ describe('Object', () => {
           })
           // @ts-expect-error: non empty object aren't caught
           .exhaustive();
+      expect(fn({a: []})).toEqual('yes');
+      expect(fn({a: null})).toEqual('yes');
+      expect(fn({a: undefined})).toEqual('yes');
       expect(fn({})).toEqual('yes');
       expect(() => fn({ hello: 'world' })).toThrow();
       expect(() => fn(() => {})).toThrow();