Bump version to 1.0.3

Author: gabrielpra1

README.md

@@ -11,7 +11,7 @@ The package can be installed by adding `uploadex` to your list of dependencies i
 ```elixir
 def deps do
   [
-    {:uploadex, "~> 1.0.2"}
+    {:uploadex, "~> 1.0.3"}
   ]
 end
 ```

mix.exs

@@ -4,7 +4,7 @@ defmodule Uploadex.MixProject do
   def project do
     [
       app: :uploadex,
-      version: "1.0.2",
+      version: "1.0.3",
       elixir: "~> 1.8",
       start_permanent: Mix.env() == :prod,
       deps: deps(),