Update dependency Mopups to 1.3.4

Author: renovate[bot]

src/Directory.Packages.props

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="ReactiveUI.Maui" Version="20.1.63" />
-    <PackageVersion Include="Mopups" Version="1.3.1" />
+    <PackageVersion Include="Mopups" Version="1.3.4" />
   </ItemGroup>
   <ItemGroup>
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />