Spec changes that we have to apply: - [ ] https://github.com/whatwg/fetch/commit/ed6221d33338d1046574e81fb9d18f4fc2a35600 - [x] https://github.com/whatwg/fetch/commit/8e4553bcc338fd6db98cc6ba60fc03cea48fad4c - [ ] https://github.com/whatwg/fetch/commit/02b2e8efdebfdb2e4d34b47587bf7b4d2d45791b - [x] https://github.com/whatwg/fetch/commit/8659a25e2dcad911a372f74ac70b60607a264e42 - [ ] https://github.com/whatwg/fetch/commit/b2f04e20b68c09e8ad279220bd5dc3c3f1168258
