* Add net6.0 to targeted frameworks

* Add net6.0 to CI

* fix: update target frameworks for integration tests ans snippets

* Refactor build process and test multiple frameworks

* Refactor build process and test multiple frameworks

* fix script call

* Refactor and update nightly and release workflows

* Trigger Integration Tests

* fix running unit tests in release stage

* fix build before running integration tests

* fix: revert to expected build name

* try only 3.1

* try no specific version

* fix set `Microsoft.NET.Test.Sdk` to 15.0.0

* Add Microsoft.TestPlatform.ObjectModel package for net462

* fix: Update xunit Packages and remove Microsoft.TestPlatform.ObjectModel package for net462

* Fix: tests

* fix: added preprocessor directives to handle differences in tests between .net versions

* Add netcoreapp3.1, net7.0 and net8.0

* fix: Add conditional package references and tests for netcoreapp3.1

* fix conditional test

* Update workflows

* fix: build before running integration tests

* Removed netcoreap3.1 and redundant net7 and net8

…utput` deprecation warnings (#376)