Bump Xamarin.GooglePlayServices.Base from 117.2.1 to 117.6.0 (#52)

Bumps [Xamarin.GooglePlayServices.Base](https://github.com/xamarin/GooglePlayServicesComponents) from 117.2.1 to 117.6.0.
- [Release notes](https://github.com/xamarin/GooglePlayServicesComponents/releases)
- [Commits](https://github.com/xamarin/GooglePlayServicesComponents/commits)

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

@@ -57,7 +57,7 @@
     <PackageReference Include="Xamarin.Google.Android.DataTransport.TransportRuntime" Version="2.2.3" />
     <PackageReference Include="Xamarin.Firebase.Messaging" Version="120.1.7" />
     <PackageReference Include="Xamarin.GooglePlayServices.Iid" Version="117.0.0" />
-    <PackageReference Include="Xamarin.GooglePlayServices.Base" Version="117.2.1" />
+    <PackageReference Include="Xamarin.GooglePlayServices.Base" Version="117.6.0" />
     <PackageReference Include="Xamarin.Android.Volley" Version="1.1.1.1" />
     <PackageReference Include="Xamarin.Azure.NotificationHubs.Android" Version="1.1.3" />