Revised to `directory < 1.3.8` on hackage

[andreasabel]

Hello lio-fs maintainers! (I hope I got the right repo here, because the Hackage publication points at https://github.com/scslab/lio but nothing has happened there in 7 years...)

In my role as Hackage Trustee, added bound directory < 1.3.8 to the publications of lio-fs on Hackage, see e.g. https://hackage.haskell.org/package/lio-fs-0.0.1.2/revisions/.

Background is that in directory-1.3.8.0, the module System.Directory is on longer declared safe, thus import safe System.Directory errors out.

Discussion at:

• directory-1.3.8.0 violates the Haskell PVP haskell/directory#147