歴史
[1] Fetch Standard
( 版)
https://fetch.spec.whatwg.org/#byte-case-insensitive
[2] Stop lowercasing header names
(annevk著, )
https://github.com/whatwg/fetch/commit/5869c43a27fff06c6dfc228fe1288018f7f2168d
[3] Define byte-case-insensitive
(annevk著, )
https://github.com/whatwg/infra/commit/e7394ca6eac78df41256516a862f65b50844e70b
[4] Editorial: let Infra define byte-case-insensitive
(annevk著, )
https://github.com/whatwg/fetch/commit/b59c72be6a0659394d0f11ae6846f51d3a990016