Bump Xamarin.AndroidX.AppCompat from 1.3.1.1 to 1.3.1.3 (#74)

Bumps [Xamarin.AndroidX.AppCompat](https://github.com/xamarin/AndroidX) from 1.3.1.1 to 1.3.1.3.
- [Release notes](https://github.com/xamarin/AndroidX/releases)
- [Commits](https://github.com/xamarin/AndroidX/commits)

---
updated-dependencies:
- dependency-name: Xamarin.AndroidX.AppCompat
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Microsoft.Azure.NotificationHubs.Client/Microsoft.Azure.NotificationHubs.Client.csproj

@@ -52,7 +52,7 @@
 
    <!-- Add Xamarin Android bindings -->  
   <ItemGroup Condition=" $(TargetFramework.StartsWith('MonoAndroid')) ">
-    <PackageReference Include="Xamarin.AndroidX.AppCompat" Version="1.3.1.1" />
+    <PackageReference Include="Xamarin.AndroidX.AppCompat" Version="1.3.1.3" />
     <PackageReference Include="Xamarin.AndroidX.Migration" Version="1.0.8" />
     <PackageReference Include="Xamarin.Google.Android.DataTransport.TransportRuntime" Version="3.0.1" />
     <PackageReference Include="Xamarin.Firebase.Messaging" Version="122.0.0.1" />