~retropikzel/r7rs-pffi-file-util

Make the slash more logical
Fix dependency version
Update dependencies

clone

read-only
https://git.sr.ht/~retropikzel/r7rs-pffi-file-util
read/write
git@git.sr.ht:~retropikzel/r7rs-pffi-file-util

You can also use your local clone with git send-email.

Adding readme to test schubert. :)