Compatibility with Elixir v1.16 (#30)

* use Enum.slice(first..last//1)

* bump version

* fix failed unit tests on grpc v0.8.1

Author: zhihuizhang17

lib/grpc_reflection/service/builder/util.ex

@@ -8,7 +8,7 @@ defmodule GrpcReflection.Service.Builder.Util do
   @type_message Map.fetch!(Google.Protobuf.FieldDescriptorProto.Type.mapping(), :TYPE_MESSAGE)
 
   def get_package(symbol) do
-    parent_symbol = symbol |> String.split(".") |> Enum.slice(0..-2) |> Enum.join(".")
+    parent_symbol = symbol |> String.split(".") |> Enum.slice(0..-2//1) |> Enum.join(".")
 
     try do
       parent_module = convert_symbol_to_module(parent_symbol)
@@ -125,12 +125,15 @@ defmodule GrpcReflection.Service.Builder.Util do
         module.__rpc_calls__()
         |> Enum.find(fn
           {_, _, _} -> true
+          {_, _, _, _} -> true
           _ -> false
         end)
         |> then(fn
           nil -> "proto2"
           {_, {req, _}, _} -> get_syntax(req)
+          {_, {req, _}, _, _} -> get_syntax(req)
           {_, _, {req, _}} -> get_syntax(req)
+          {_, _, {req, _}, _} -> get_syntax(req)
         end)
 
       true ->

mix.exs

@@ -1,7 +1,7 @@
 defmodule GrpcReflection.MixProject do
   use Mix.Project
 
-  @version "0.1.1"
+  @version "0.1.2"
   @source_url "https://github.com/elixir-grpc/grpc-reflection"
   @description "gRPC reflection server for Elixir"