[Flint] Fix in lock step the version of flint, antic, arb, calcium

Author: bobot

packages/antic/antic.0.1.5/opam

@@ -7,7 +7,7 @@ homepage: "https://github.com/bobot/ocaml-flint"
 bug-reports: "https://github.com/bobot/ocaml-flint/issues"
 depends: [
   "dune" {>= "3.2"}
-  "flint"
+  "flint" {= version}
   "ctypes" {>= "0.20.1"}
   "conf-mpfr" {>= "3"}
   "ocaml" {>= "4.10"}

packages/arb/arb.0.1.5/opam

@@ -7,7 +7,7 @@ homepage: "https://github.com/bobot/ocaml-flint"
 bug-reports: "https://github.com/bobot/ocaml-flint/issues"
 depends: [
   "dune" {>= "3.2"}
-  "flint"
+  "flint" {= version}
   "ctypes" {>= "0.20.1"}
   "conf-mpfr" {>= "3"}
   "ocaml" {>= "4.10"}

packages/calcium/calcium.0.1.5/opam

@@ -9,9 +9,9 @@ bug-reports: "https://github.com/bobot/ocaml-flint/issues"
 depends: [
   "dune" {>= "3.2"}
   "zarith" {>= "1.12"}
-  "flint"
-  "arb"
-  "antic"
+  "flint" {= version}
+  "arb" {= version}
+  "antic" {= version}
   "ctypes" {>= "0.20.1"}
   "conf-mpfr" {>= "3"}
   "dune-site" {with-test}