fixup! Fix pipeing a Web Stream to an ArrayStream

Author: twiss

lib/streams.js

@@ -129,7 +129,9 @@ async function pipe(input, target, {
     } catch(e) {}
     return;
   }
-  input = toArrayStream(input);
+  if (!isStream(input)) {
+    input = toArrayStream(input);
+  }
   const reader = getReader(input);
   const writer = getWriter(target);
   try {