refactor code loading conditionals in clients

Author: suazithustra

lib/arangox/client/gun.ex

@@ -1,4 +1,4 @@
-if Code.ensure_compiled(:gun) == {:module, :gun} do
+if Code.ensure_loaded?(:gun) do
   defmodule Arangox.GunClient do
     @moduledoc """
     An HTTP client implementation of the \

lib/arangox/client/mint.ex

@@ -1,4 +1,4 @@
-if Code.ensure_compiled(Mint.HTTP) == {:module, Mint.HTTP} do
+if Code.ensure_loaded?(Mint.HTTP1) do
   defmodule Arangox.MintClient do
     @moduledoc """
     An HTTP client implementation of the \

lib/arangox/client/velocy.ex

@@ -1,4 +1,4 @@
-if Code.ensure_compiled(VelocyPack) == {:module, VelocyPack} do
+if Code.ensure_loaded?(VelocyPack) do
   defmodule Arangox.VelocyClient do
     @moduledoc """
     The default client. Implements the \

lib/arangox/connection.ex

@@ -160,7 +160,7 @@ defmodule Arangox.Connection do
     do: {:ok, %{state | username: nil, password: nil}}
 
   defp resolve_auth(%__MODULE__{client: VelocyClient} = state) do
-    case VelocyClient.authorize(state) do
+    case apply(VelocyClient, :authorize, [state]) do
       :ok ->
         {:ok, state}
 

mix.exs

@@ -1,7 +1,7 @@
 defmodule Arangox.MixProject do
   use Mix.Project
 
-  @version "0.5.2"
+  @version "0.5.3"
   @description """
   ArangoDB 3.3.9+ driver for Elixir with connection pooling, support for \
   VelocyStream, active failover, transactions and streamed cursors.