v0.5.0

Bug Fix

• Fix an issue on some versions of node-fetch where the constructor of the returned response is not Response, but rather a different Body class that does not set the same properties. This caused our cloned response instance to not have a headers property. Now, we check the input Fetch instance for a Response property (like node-fetch does) or try to get it from global (like isomorphic-fetch does) before falling back to response.constructor. To fully override the class (for more complicated scenarios), use the new Response option to withHar.

Internal

• Add real tests using Jest. All of node-fetch, isomorphic-fetch, and isomorphic-unfetch are tested. Even though they all use node-fetch, isomorphic-fetch uses an old version, and we may need to test additional integration points (like what properties exist on the default export).