several improvements

lib/jsont.ex

@@ -1,5 +1,6 @@
 defmodule Jsont do
   @type encode_opt :: {:bigint_as_string, boolean()} | {:strip_elixir_struct, boolean()}
+  @type decode_opt :: {:validate_unicode, boolean()}
 
   @spec encode(term(), [encode_opt()]) :: {:ok, String.t()} | {:error, any()}
   def encode(value, opts \\ []) do
@@ -9,7 +10,8 @@ defmodule Jsont do
   end
 
   @spec decode(iodata()) :: {:ok, term()} | {:error, any()}
-  def decode(value) do
-    Jsont.NifBridge.decode(value)
+  def decode(value, opts \\ []) do
+    validate_unicode = opts[:validate_unicode] || false
+    Jsont.NifBridge.decode(value, validate_unicode)
   end
 end

lib/jsont/nif_bridge.ex

@@ -7,6 +7,6 @@ defmodule Jsont.NifBridge do
   def encode(_value, _bigint_as_string, _skip_elixir_struct),
     do: :erlang.nif_error(:nif_not_loaded)
 
-  @spec decode(iodata()) :: {:ok, term()} | {:error, any()}
-  def decode(_value), do: :erlang.nif_error(:nif_not_loaded)
+  @spec decode(iodata(), boolean()) :: {:ok, term()} | {:error, any()}
+  def decode(_value, _validate_unicode), do: :erlang.nif_error(:nif_not_loaded)
 end

native/jsont_nif/Cargo.toml

@@ -10,8 +10,7 @@ path = "src/lib.rs"
 crate-type = ["cdylib"]
 
 [dependencies]
-num-bigint = "0.4.4"
-rustler = "0.31.0"
+rustler = { version = "0.32.1", features = ["big_integer"] }
 serde_json = "1.0.111"
 simdutf8 = "0.1.4"