Fix upcase error and test

lib/request.ex

@@ -95,7 +95,7 @@ defmodule Vultr.Request do
 				end)
 
 			if is_special_param do
-				{String.upcase(k), v}
+				{k |> Atom.to_string |> String.upcase, v}
 			else
 				{k, v}
 			end
@@ -172,7 +172,7 @@ defmodule Vultr.Request do
 			raise ArgumentError, message: "Bad method"
 		end
 
-		method |> Atom.to_string |> String.upcase()
+		method |> Atom.to_string |> String.upcase
 	end
 
 	defp doc_api_key(nil), do: "No"

mix.exs

@@ -8,7 +8,7 @@ defmodule Vultr.Mixfile do
 	def project do
 		[
 			app: :vultr,
-			version: "0.2.0",
+			version: "0.2.1",
 			elixir: "~> 1.3",
 			deps: deps(),
 			description: @description,

test/vultr_test.exs

@@ -2,7 +2,6 @@ defmodule VultrTest do
   use ExUnit.Case
 
   test "requests work" do
-  	response = Vultr.app_list()
-    assert response.status === 200
+    assert {:ok, _} = Vultr.app_list()
   end
 end