Added a reference project for integration tests, upped the version, t…

…ime for a merge

9.0.0 is being released!

Updated readme to reflect .NET 9 requirement

#340 updated changelog, added a test, time for a merge

Time for a 8.3.0 release!

Removed CsvHelper for now, will address in the future, time for a merge

Time for 8.1.0 release

8.0.0 is DONE!

More collection expressions!

#292 #293 made some changes around handler field usage