chore(deps): update dependency xamarin.android.support.loader to v28.0.0.3 (#845)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Xamarin/ReactiveRecyclerView/Droid/TestApp.Droid.csproj

@@ -117,7 +117,7 @@
       <Version>28.0.0.3</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Android.Support.Loader">
-      <Version>28.0.0.1</Version>
+      <Version>28.0.0.3</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Android.Support.LocalBroadcastManager">
       <Version>28.0.0.1</Version>