fix opam file after new version published

Author: jzstark

owl-plplot.opam

@@ -9,14 +9,14 @@ doc: "https://owlbarn.github.io/owl-plplot/"
 synopsis: "Owl-Plplot: thin plotting layer for Owl based on plplot"
 
 build: [
-  [ "dune" "subst" ] {pinned}
+  [ "dune" "subst" ] {dev}
   [ "dune" "build" "-p" name "-j" jobs ]
 ]
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.0.0"}
-  "owl" {>= "1.0"}
+  "dune" {>= "3.16"}
+  "owl" {>= "1.2"}
   "plplot"
 ]