Update README and mix.exs for patch release (#65)

Author: ihumanable

README.md

@@ -54,7 +54,7 @@ Add patch to your mix.exs
 ```elixir
 def deps do
   [
-    {:patch, "~> 0.13.0", only: [:test]}
+    {:patch, "~> 0.13.1", only: [:test]}
   ]
 end
 ```
@@ -202,6 +202,8 @@ Patch is made better everyday by developers requesting new features.
   - Improved the ci.yml, brining it up to date with best practices.
 - [Dorgan](https://github.com/doorgan)
   - Reported erratum in the Patch Cheatsheet
+- [Luca Corti](https://github.com/lucacorti)
+  - Reported an issue with warning being emitted by the library on Elixir 1.16 which served as the basis for a bugfix in v0.13.1
 
 If you have a suggestion for improvements to this library, please open an issue.
 

mix.exs

@@ -4,7 +4,7 @@ defmodule Patch.MixProject do
   def project do
     [
       app: :patch,
-      version: "0.13.0",
+      version: "0.13.1",
       elixir: "~> 1.7",
       erlc_paths: erlc_paths(Mix.env()),
       elixirc_paths: elixirc_paths(Mix.env()),