Bump TimeZoneConverter from 6.1.0 to 7.0.0 in /tests/NHapi.Base.NUnit

Bumps [TimeZoneConverter](https://github.com/mattjohnsonpint/TimeZoneConverter) from 6.1.0 to 7.0.0.
- [Release notes](https://github.com/mattjohnsonpint/TimeZoneConverter/releases)
- [Commits](mattjohnsonpint/TimeZoneConverter@6.1.0...7.0.0)

---
updated-dependencies:
- dependency-name: TimeZoneConverter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

tests/NHapi.Base.NUnit/NHapi.Base.NUnit.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="TimeZoneConverter" Version="6.1.0" />
+    <PackageReference Include="TimeZoneConverter" Version="7.0.0" />
 
     <PackageReference Include="coverlet.collector" Version="6.0.3">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>