chore: align fetch to spec (#10203)

This commit aligns the `fetch` API and the `Request` / `Response`
classes belonging to it to the spec. This commit enables all the
relevant `fetch` WPT tests. Spec compliance is now at around 90%.

Performance is essentially identical now (within 1% of 1.9.0).

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index 0ea14c5b7..972519d27 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -100,6 +100,7 @@ export async function runSingleTest(
       reporter(result);
     } else {
       stderr += line + "\n";
+      console.error(stderr);
     }
   }