Resolves #19: elixir 1.7, __STACKTRACE__, and fix event typespec

lib/maestro/aggregate/root.ex

@@ -98,7 +98,7 @@ defmodule Maestro.Aggregate.Root do
           Root.persist_snapshot(snap)
         end
       rescue
-        err -> {:error, err, System.stacktrace()}
+        err -> {:error, err, __STACKTRACE__}
       end
 
       def call(agg_id, msg) do
@@ -146,7 +146,7 @@ defmodule Maestro.Aggregate.Root do
         {:reply, {:ok, agg.state}, agg}
       rescue
         err ->
-          {:reply, {:error, err, System.stacktrace()}, agg}
+          {:reply, {:error, err, __STACKTRACE__}, agg}
       end
 
       def handle_call(:get_current, _from, agg) do
@@ -156,20 +156,20 @@ defmodule Maestro.Aggregate.Root do
       def handle_call({:replay, seq}, _from, agg) do
         {:reply, {:ok, Root.replay(agg, seq)}, agg}
       rescue
-        err -> {:reply, {:error, err, System.stacktrace()}, agg}
+        err -> {:reply, {:error, err, __STACKTRACE__}, agg}
       end
 
       def handle_call(:get_snapshot, _from, agg) do
         body = prepare_snapshot(agg.state)
         {:reply, {:ok, Root.to_snapshot(agg, body)}, agg}
       rescue
-        err -> {:reply, {:error, err, System.stacktrace()}, agg}
+        err -> {:reply, {:error, err, __STACKTRACE__}, agg}
       end
 
       def handle_call({:eval_command, command}, _from, agg) do
         {:reply, :ok, Root.eval_command(agg, command)}
       rescue
-        err -> {:reply, {:error, err, System.stacktrace()}, agg}
+        err -> {:reply, {:error, err, __STACKTRACE__}, agg}
       end
 
       def handle_info(:init, agg), do: {:noreply, Root.update_aggregate(agg)}
@@ -411,7 +411,7 @@ defmodule Maestro.Aggregate.Root do
       {:module, module} -> module
     end
   rescue
-    _ -> reraise(InvalidHandlerError, [type: type], System.stacktrace())
+    _ -> reraise(InvalidHandlerError, [type: type], __STACKTRACE__)
   end
 
   @doc """

lib/maestro/types/event.ex

@@ -23,6 +23,7 @@ defmodule Maestro.Types.Event do
           timestamp: HLClock.Timestamp.t(),
           aggregate_id: aggregate_id(),
           sequence: sequence(),
+          type: String.t(),
           body: map()
         }
 

mix.exs

@@ -1,14 +1,14 @@
 defmodule Maestro.Mixfile do
   use Mix.Project
 
-  @version "0.2.0"
+  @version "0.2.1"
   @source_url "https://github.com/toniqsystems/maestro"
 
   def project do
     [
       app: :maestro,
       version: @version,
-      elixir: "~> 1.6",
+      elixir: "~> 1.7",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),