legacy-uppercased-byte less than

legacy-uppercased-byte less than

[1] Change how getAllResponseHeaders() sorts (annevk著, ) https://github.com/whatwg/xhr/commit/985f2f7a6de02dce42e157e02e9bb540d2750edc

[2] Sort headers as if ASCII-uppercased · Issue #248 · whatwg/xhr () https://github.com/whatwg/xhr/issues/248

[3] Change how getAllResponseHeaders() sorts by annevk · Pull Request #249 · whatwg/xhr () https://github.com/whatwg/xhr/pull/249