Bump Argon from 0.17.0 to 0.19.0 in /src (#518)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="Argon" Version="0.17.0" />
+    <PackageVersion Include="Argon" Version="0.19.0" />
     <PackageVersion Include="Caseless.Fody" Version="1.9.1" />
     <PackageVersion Include="EmptyFiles" Version="8.3.0" />
     <PackageVersion Include="Fody" Version="6.8.1" />