> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 1.30.3 **`(fix):`** Use `any` instead of `interface{}` for unknown type schemas. Since Go 1.18+, `any` is the idiomatic alias for `interface{}`. This is a purely cosmetic modernization with no behavioral change. ## 1.30.2 **`(fix):`** Fix Basic Auth header not being sent when the username is an empty string. Per RFC 7617, an empty user-id is valid in Basic Auth (e.g., `:password`). The condition in `ToHeader()` now uses `||` instead of `&&`, so the Authorization header is set whenever either the username or password is non-empty.