Add csv package as dependency.

caisar.opam

@@ -13,6 +13,7 @@ depends: [
   "yojson" {>= "1.7.0"}
   "menhirLib" {>= "20210310"}
   "ppx_deriving_yojson" {>= "3.6.1"}
+  "csv" {>= "2.4"}
   "odoc" {with-doc}
 ]
 build: [

dune-project

@@ -20,6 +20,7 @@
    (yojson (>= 1.7.0))
    (menhirLib (>= 20210310))
    (ppx_deriving_yojson (>= 3.6.1))
+   (csv (>= 2.4))
   )
 )