Bump EmptyFiles from 8.3.0 to 8.4.0 in /src (#525)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -6,7 +6,7 @@
   <ItemGroup>
     <PackageVersion Include="Argon" Version="0.21.0" />
     <PackageVersion Include="Caseless.Fody" Version="1.9.1" />
-    <PackageVersion Include="EmptyFiles" Version="8.3.0" />
+    <PackageVersion Include="EmptyFiles" Version="8.4.0" />
     <PackageVersion Include="Fody" Version="6.8.1" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />