Update sherlodoc dune constraint

jonludlam · jonludlam · commit d70351bb8d9e · 2025-07-10T11:20:13.000+01:00
diff --git a/sherlodoc.opam b/sherlodoc.opam
@@ -8,7 +8,7 @@ homepage: "https://github.com/ocaml/odoc"
 doc: "https://ocaml.github.io/odoc/"
 bug-reports: "https://github.com/ocaml/odoc/issues"
 depends: [
-  "dune" {>= "3.7"}
+  "dune" {>= "3.18"}
   "ocaml" {>= "4.0.8"}
   "odoc" {= version}
   "base64" {>= "3.5.1"}
