Update SDK to preserve backward compatibility

sdk/cmly_api.ml

@@ -119,8 +119,11 @@ module type GRAMMAR = sig
     include INDEXED with type t = lr1
     val lr0          : t -> lr0
     val transitions  : t -> (symbol * t) list
-    val reductions   : t -> (terminal * production) list
+    val get_reductions : t -> (terminal * production) list
     val default_reduction : t -> production option
+
+    val reductions   : t -> (terminal * production list) list
+    [@@@ocaml.deprecated "Please use [get_reductions]"]
   end
 
   module Print : sig

sdk/cmly_read.ml

@@ -214,12 +214,15 @@ module Lift (G : sig val grammar : grammar end) : GRAMMAR = struct
     let table = grammar.g_lr1_states
     let lr0         i = table.(i).lr1_lr0
     let transitions i = table.(i).lr1_transitions
-    let reductions  i = table.(i).lr1_reductions
+    let get_reductions i = table.(i).lr1_reductions
     let default_reduction i = table.(i).lr1_default_reduction
     include Index(struct
       let name = "Lr1"
       let count = Array.length table
     end)
+    let reductions i =
+      List.map (fun (s, p) -> (s, [p]))
+	table.(i).lr1_reductions
   end
 
   module Print = struct