Use file-attributes instead of Osicat?

Hi again, in file.lisp:

;; TODO: Use `file-attributes' when
;; https://github.com/Shinmera/file-attributes/issues/1 is fixed.

which was fixed quickly.

Can file-attributes replace osicat?

I'd benefit from it, since osicat makes it more difficult to ship binaries by relying on libosicat.so. file-attributes relies on FFI calls and has no such external dependency.