Bump ServiceStack in /tests/ServiceStack.OrmLite.Tests.Vb (#668)

Bumps [ServiceStack](https://github.com/ServiceStack/ServiceStack) from 5.6.1 to 5.9.2.
- [Release notes](https://github.com/ServiceStack/ServiceStack/releases)
- [Commits](https://github.com/ServiceStack/ServiceStack/commits/v5.9.2)

---
updated-dependencies:
- dependency-name: ServiceStack
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

tests/ServiceStack.OrmLite.Tests.Vb/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NUnit" version="3.12.0" targetFramework="net472" />
-  <package id="ServiceStack" version="5.6.1" targetFramework="net472" />
+  <package id="ServiceStack" version="5.9.2" targetFramework="net472" />
   <package id="ServiceStack.Client" version="5.6.1" targetFramework="net472" />
   <package id="ServiceStack.Common" version="5.6.1" targetFramework="net472" />
   <package id="ServiceStack.Interfaces" version="5.6.1" targetFramework="net472" />