chore(deps): update dependency xamarin.android.support.slidingpanelayout to 28.0.0.3

Author: renovate[bot]

Xamarin/ReactiveRecyclerView/Droid/TestApp.Droid.csproj

@@ -129,7 +129,7 @@
       <Version>28.0.0.1</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Android.Support.SlidingPaneLayout">
-      <Version>28.0.0.1</Version>
+      <Version>28.0.0.3</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Android.Support.SwipeRefreshLayout">
       <Version>28.0.0.1</Version>