chore(deps): update dependency system.threading.tasks.extensions to v4.5.4

Author: renovate[bot]

Xamarin/ReactiveRecyclerView/iOS/TestApp.iOS.csproj

@@ -164,7 +164,7 @@
       <Version>8.1.1</Version>
     </PackageReference>
     <PackageReference Include="System.Threading.Tasks.Extensions">
-      <Version>4.5.3</Version>
+      <Version>4.5.4</Version>
     </PackageReference>
     <PackageReference Include="Xam.Plugin.Connectivity">
       <Version>3.2.0</Version>

Xamarin/Timer/Timer/Timer.csproj

@@ -58,7 +58,7 @@
     <PackageReference Include="Splat" Version="7.2.1" />
     <PackageReference Include="System.Reactive" Version="4.1.5" />
     <PackageReference Include="System.Runtime.InteropServices.WindowsRuntime" Version="4.3.0" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
   </ItemGroup>
   <ItemGroup>
     <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json" />