Merge pull request ocaml#22772 from kit-ty-kate/fix-187

piaf is not compatible with OCaml 5.0

Author: kit-ty-kate

packages/piaf/piaf.0.1.0/opam

@@ -10,7 +10,7 @@ build: [
   ["dune" "build" "-p" name "-j" jobs]
 ]
 depends: [
-  "ocaml" {>= "4.08"}
+  "ocaml" {>= "4.08" & < "5.0"}
   "dune" {>= "2.5"}
   "angstrom"
   "faraday" {>= "0.8.1"}