v4.13.15

What's Changed

• fix(auth): escape backslashes in the WWW-Authenticate realm by @yusukebe in #5590
• docs(contributing): drop the note about linking a fork branch by @yusukebe in #5593
• fix(context): allow c.header() after the response body is consumed by @yusukebe in #5587

Full Changelog: v4.13.14...v4.13.15