Apply suggestions from code review

Author: mseri

packages/chess_com_api/chess_com_api.1.0.1/opam

@@ -12,7 +12,7 @@ doc: "https://github.com/ckaf/pgn_parser"
 bug-reports: "https://github.com/ckaf/pgn_parser/issues"
 depends: [
   "ocaml" {>= "4.14"}
-  "dune" {>= "3.19" & >= "3.0"}
+  "dune" {>= "3.19"}
   "cohttp-lwt-unix" {>= "5.0"}
   "yojson" {>= "1.7"}
   "lwt" {>= "5.6"}

packages/lichess_api/lichess_api.1.0.1/opam

@@ -12,7 +12,7 @@ doc: "https://github.com/ckaf/pgn_parser"
 bug-reports: "https://github.com/ckaf/pgn_parser/issues"
 depends: [
   "ocaml" {>= "4.14"}
-  "dune" {>= "3.19" & >= "3.0"}
+  "dune" {>= "3.19"}
   "cohttp-lwt-unix" {>= "5.0"}
   "yojson" {>= "1.7"}
   "lwt" {>= "5.6"}

packages/pgn_parser/pgn_parser.1.0.1/opam

@@ -23,7 +23,7 @@ doc: "https://github.com/ckaf/pgn_parser"
 bug-reports: "https://github.com/ckaf/pgn_parser/issues"
 depends: [
   "ocaml" {>= "4.14"}
-  "dune" {>= "3.19" & >= "3.0"}
+  "dune" {>= "3.19"}
   "qcheck" {>= "0.21"}
   "cohttp-lwt-unix" {>= "5.0"}
   "yojson" {>= "1.7"}