Support custom `response` properties

v1.4.0

Custom Response Properties

This update adds the much-desired ability to customize the properties of your mocked responses! Includes everything from HTTP headers to fields in the XMLHttpRequest/fetch Response objects themselves.

Simply add your desired fields in the new responseProperties object, and they will permeate through both XHR/response objects.

For example:

const myUrl = '/my/url';

MockRequests.setDynamicMockUrlResponse(myUrl, {
    response: { error: 'You must input a valid email address' },
    responseProperties: {
        ok: false,
        headers: {
            status: 400,
        },
    },
});

const res = await fetch(myUrl, { ...options });

console.log(res.ok); // false
console.log(res.headers.get('status')); // 400

Support Fetch API's response.clone() Function

This also adds support for (await fetch(...)).clone() to ensure all your source/test code using the .clone() function works as expected.