Fix m4a magic number signature

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.2.3 (2022-04-26)
+
+- Bug fixes
+  - Fix m4a magic number signature
+
 ## 0.2.2 (2022-03-24)
 
 - Changes

README.md

@@ -12,7 +12,7 @@ by adding `infer` to your list of dependencies in `mix.exs`:
 ```elixir
 def deps do
   [
-    {:infer, "~> 0.2.2"}
+    {:infer, "~> 0.2.3"}
   ]
 end
 ```

lib/matchers/audio.ex

@@ -27,9 +27,17 @@ defmodule Infer.Audio do
 
   @doc """
   Takes the binary file contents as arguments. Returns `true` if it's a m4a.
+
+
+  ## Examples
+
+      iex> binary = File.read!("test/audio/sample.m4a")
+      iex> Infer.Audio.m4a?(binary)
+      true
+
   """
   @spec m4a?(binary()) :: boolean()
-  def m4a?(<<_data::binary-size(4), 0x66, 0x74, 0x79, 0x70, 0x4D, 0x3F, 0x41, _rest::binary>>), do: true
+  def m4a?(<<_data::binary-size(4), 0x66, 0x74, 0x79, 0x70, 0x4D, 0x34, 0x41, _rest::binary>>), do: true
   def m4a?(<<0x4D, 0x34, 0x41, 0x20, _rest::binary>>), do: true
   def m4a?(_binary), do: false
 

mix.exs

@@ -4,7 +4,7 @@ defmodule Infer.MixProject do
   def project do
     [
       app: :infer,
-      version: "0.2.2",
+      version: "0.2.3",
       elixir: "~> 1.10",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,