Bump TimeZoneConverter to 6.1.0

Author: mattjohnsonpint

src/TimeZoneNames/TimeZoneNames.csproj

@@ -27,7 +27,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="TimeZoneConverter" Version="6.0.1" />
+    <PackageReference Include="TimeZoneConverter" Version="6.1.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All"/>
   </ItemGroup>