core c0.16 is not compatible with ocaml 5.1

Author: mseri

packages/core/core.v0.16.0/opam

@@ -10,7 +10,7 @@ build: [
   ["dune" "build" "-p" name "-j" jobs]
 ]
 depends: [
-  "ocaml"               {>= "4.14.0"}
+  "ocaml"               {>= "4.14.0" & < "5.1~"}
   "base"                {>= "v0.16" & < "v0.17"}
   "base_bigstring"      {>= "v0.16" & < "v0.17"}
   "base_quickcheck"     {>= "v0.16" & < "v0.17"}