bugfix(#1303): use hasOwn function on Object + test coverage

Author: nolliebigspin

packages/serialize/src/index.ts

@@ -28,9 +28,10 @@ export const defaultSerialize = (data: any): string => {
 		// eslint-disable-next-line guard-for-in
 		for (const k in data) {
 			const ignore = typeof data[k] === 'function' || (!array && data[k] === undefined);
-			if (!Object.prototype.hasOwnProperty.call(data, k) || ignore) {
-        continue;
-      }
+			// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+			if (!Object.hasOwn(data, k) || ignore) {
+				continue;
+			}
 
 			if (!first) {
 				s += ',';

packages/serialize/test/test.ts

@@ -71,6 +71,15 @@ test.it('defaultSerialize detects base64 on string', t => {
 	t.expect(result.encoded.toString()).toBe('hello world');
 });
 
+test.it('defaultSerialize accepts objects created with null', t => {
+	const json = Object.create(null);
+	json.someKey = 'value';
+
+	const result = defaultSerialize<{someKey: string}>(json);
+
+	t.expect(result).toStrictEqual('{"someKey":"value"}');
+});
+
 test.it('removes the first colon from strings not prefixed by base64', t => {
 	const json = JSON.stringify({
 		simple: ':hello',