Support new elixir-graphql query execution style.

mix.exs

@@ -28,7 +28,7 @@ defmodule PlugGraphql.Mixfile do
      {:cowboy, "~> 1.0"},
      {:plug, "~> 0.14 or ~> 1.0"},
      {:poison, "~> 1.5"},
-     {:graphql, "~> 0.0.4"}]
+     {:graphql, "0.0.6"}]
   end
 
   defp package do

mix.lock

@@ -2,7 +2,7 @@
   "cowlib": {:hex, :cowlib, "1.0.2"},
   "earmark": {:hex, :earmark, "0.1.19"},
   "ex_doc": {:hex, :ex_doc, "0.11.0"},
-  "graphql": {:hex, :graphql, "0.0.4"},
+  "graphql": {:hex, :graphql, "0.0.6"},
   "plug": {:hex, :plug, "1.0.2"},
   "poison": {:hex, :poison, "1.5.0"},
   "ranch": {:hex, :ranch, "1.2.0"}}

test/graphql/plug/endpoint_test.exs

@@ -8,19 +8,18 @@ defmodule GraphQL.Plug.EndpointTest do
       %GraphQL.Schema{
         query: %GraphQL.ObjectType{
           name: "RootQueryType",
-          fields: [
-            %GraphQL.FieldDefinition{
-              name: "greeting",
+          fields: %{
+            greeting: %GraphQL.FieldDefinition{
               type: "String",
-              resolve: &TestSchema.greeting/1,
+              resolve: &TestSchema.greeting/3,
             }
-          ]
+          }
         }
       }
     end
 
-    def greeting(name: name), do: "Hello, #{name}!"
-    def greeting(_), do: greeting(name: "world")
+    def greeting(_, %{name: name}, _), do: "Hello, #{name}!"
+    def greeting(_, _, _), do: greeting(%{}, %{name: "world"}, %{})
   end
 
   # Setup a Plug which calls the Plug under test