Bump Argon.NodaTime from 0.17.0 to 0.19.0 in /src (#272)

Bumps [Argon.NodaTime](https://github.com/SimonCropp/Argon) from 0.17.0 to 0.19.0.
- [Release notes](https://github.com/SimonCropp/Argon/releases)
- [Commits](https://github.com/SimonCropp/Argon/commits/0.19.0)

---
updated-dependencies:
- dependency-name: Argon.NodaTime
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="Argon.NodaTime" Version="0.17.0" />
+    <PackageVersion Include="Argon.NodaTime" Version="0.19.0" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageVersion Include="NodaTime" Version="3.1.11" />