`str(req)` doesn't obfuscate headers

[hadley]

library(httr2)

req <- request("http://example.com") |> 
  req_auth_basic("user", "password")
str(req)
#> List of 7
#>  $ url     : chr "http://example.com"
#>  $ method  : NULL
#>  $ headers :List of 1
#>   ..$ Authorization: chr "Basic dXNlcjpwYXNzd29yZA=="
#>   ..- attr(*, "redact")= chr "Authorization"
#>  $ body    : NULL
#>  $ fields  : list()
#>  $ options : list()
#>  $ policies: list()
#>  - attr(*, "class")= chr "httr2_request"

^{Created on 2025-02-12 with reprex v2.1.0}