Apply suggestions from code review

Co-authored-by: Shon Feder <[email protected]>

Author: mseri

packages/gettext-camomile/gettext-camomile.0.5.0/opam

@@ -8,6 +8,7 @@ homepage: "https://github.com/gildor478/ocaml-gettext"
 doc: "https://gildor478.github.io/ocaml-gettext/"
 bug-reports: "https://github.com/gildor478/ocaml-gettext/issues"
 depends: [
+  "ocaml" {>= "4.14"}
   "dune" {>= "3.17"}
   "gettext" {= version}
   "camomile" {>= "2.0.0"}

packages/gettext-stub/gettext-stub.0.5.0/opam

@@ -8,6 +8,7 @@ homepage: "https://github.com/gildor478/ocaml-gettext"
 doc: "https://gildor478.github.io/ocaml-gettext/"
 bug-reports: "https://github.com/gildor478/ocaml-gettext/issues"
 depends: [
+  "ocaml" {>= "4.14"}
   "dune" {>= "3.17"}
   "gettext" {= version}
   "dune-configurator" {>= "3.17.0"}