* Minimal changes to make headers appear on empty result sets
* Columns for everyone!
* Updating tests - some don't pass yet
* Adding some more tests to verify the changes for column/row selection
* null default columns
* Updates to comments as per PR comments
* Remove xunit dependency from testdriver
* swap expected/actual as needed
* Convert Test.Common to nunit
* port hosting unit tests to nunit
* port batchparser integration tests to nunit
* port testdriver.tests to nunit
* fix target to copy dependency
* port servicelayer unittests to nunit
* more unit test fixes
* port integration tests to nunit
* fix test method type
* try using latest windows build for PRs
* reduce test memory use
* Switch to the unified SMO NuGet so all binaries are strong named and signed.
* use one AssemblyLoader instance for all loads
* Revert "use one AssemblyLoader instance for all loads"
This reverts commit 48c59ffd5c57152de281c87acdbcad7ddf7ab760.
* Stop creating multiple AssemblyLoadContext objects during composition, per https://github.com/dotnet/coreclr/issues/19632
* restore high entropyva property
* Improve the comment
* Update SMO to 150 and fix scripting for objects with a single quote in their name.
* restore newtonsoft reference
