adds the sedlex lower bound

Author: ivg

packages/piqilib/piqilib.0.6.16/opam

@@ -10,7 +10,7 @@ depends: [
   "ocaml" {>= "4.03"  & < "4.14.0"}
   "dune" {>= "2.0.0"}
   "easy-format"
-  "sedlex" {< "3.0"}
+  "sedlex" {>= "2.0" & < "3.0"}
   "xmlm"
   "base64" {>= "3.1.0"}
 ]