fix(http): allow for undefined headers

Author: Daniel A. White

lib/resolvers/http.js

@@ -101,7 +101,7 @@ async function download (u, httpOptions, redirects) {
 
  // Certain implementations of `fetch` do not support URL based basic-auth
  // Convert to headers
- const headers = new Headers(httpOptions.headers);
+ const headers = new Headers(httpOptions.headers || {});
  if (u.auth && !headers.has("Authorization")) {
  headers.set("Authorization", "Basic " + btoa(u.auth));
  }
@@ -113,7 +113,7 @@ async function download (u, httpOptions, redirects) {
  /** @type {RequestInit} */
  const init = {
  method: "GET",
- headers: Object.fromEntries(headers.entries()),
+ headers,
  credentials: httpOptions.withCredentials ? "include" : "omit",
  signal: controller.signal,
  // browser fetch API does not support redirects https://fetch.spec.whatwg.org/#atomic-http-redirect-handling

package.json

@@ -1,6 +1,6 @@
 {
  "name": "@stoplight/json-schema-ref-parser",
- "version": "9.2.3",
+ "version": "9.2.4",
  "description": "Parse, Resolve, and Dereference JSON Schema $ref pointers",
  "keywords": [
  "json",