Fix Seq usage (OCaml<4.07) and dependency to unix package (OCaml>=5)

dune

@@ -3,7 +3,7 @@
  (modules numpy py pyops pycaml pyml_arch pytypes pywrappers pyutils)
  (foreign_stubs (language c) (names numpy_stubs pyml_stubs))
  (wrapped false)
- (libraries bigarray stdcompat))
+ (libraries unix bigarray stdcompat))
 
 (executables
  (names generate)

py.mli

@@ -723,16 +723,16 @@ module Dict: sig
  (** [to_bindings_string o] returns all the pairs [(key, value)] in the Python
  dictionary [o]. *)
 
- val to_bindings_seq: Object.t -> (Object.t * Object.t) Seq.t
+ val to_bindings_seq: Object.t -> (Object.t * Object.t) Stdcompat.Seq.t
  (** [to_bindings_seq o] returns the ephemeral sequence of all the pairs
  (key, value) in the Python dictionary [o]. *)
 
  val to_bindings_seq_map: (Object.t -> 'a) -> (Object.t -> 'b) -> Object.t ->
- ('a * 'b) Seq.t
+ ('a * 'b) Stdcompat.Seq.t
  (** [to_bindings_seq_map fkey fvalue o] returns the ephemeral sequence of all
  the pairs (fkey key, fvalue value) in the Python dictionary [o]. *)
 
- val to_bindings_string_seq: Object.t -> (string * Object.t) Seq.t
+ val to_bindings_string_seq: Object.t -> (string * Object.t) Stdcompat.Seq.t
  (** [to_bindings_string_seq o] returns the ephemeral sequence of all the pairs
  (key, value) in the Python dictionary [o]. *)
 

pyml.opam

@@ -32,4 +32,3 @@ build: [
  ]
 ]
 dev-repo: "git+https://github.com/thierry-martinez/pyml.git"
-version: "20220615"