Apply suggestions from code review

Author: mseri

packages/quickjs/quickjs.0.1.1/opam

@@ -10,7 +10,7 @@ depends: [
   "dune" {>= "3.8"}
   "ocaml" {>= "4.14.1"}
   "integers"
-  "ctypes"
+  "ctypes" {>= "0.13.0"}
   "alcotest" {with-test}
   "fmt" {with-test}
   "odoc" {with-doc}

packages/quickjs/quickjs.0.1.2/opam

@@ -10,7 +10,7 @@ depends: [
   "dune" {>= "3.8"}
   "ocaml" {>= "4.14.1"}
   "integers"
-  "ctypes"
+  "ctypes" {>= "0.13.0"}
   "alcotest" {with-test}
   "fmt" {with-test}
   "odoc" {with-doc}