* Remove content_length since it'll be overwritten by the response body. FIXES#1439
* Add setting of Content-Length to the no_chunking function
* Add changes and migration documentations
* Update MIGRATION.md
Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>
Co-authored-by: Rob Ede <robjtede@icloud.com>
Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>