GitLab

* start supporting Python 3.9

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update .appveyor.yml

* Update .vsts-ci.yml

* Update .appveyor.yml

* fixed conflicts

* continue

* test different CUDA versions

* Update cuda.yml

* Update cuda.yml

* Update setup.sh

* Update setup.sh

* Update cuda.yml

* Update cuda.yml

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update CMakeLists.txt

* Update CMakeLists.txt

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update CMakeLists.txt

* specify CUDA version in workflow job name

* Update setup.sh

* Update cuda.yml

* Update cuda.yml

* Update README.md

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update cuda.yml

* Update cuda_tree_learner.cpp

* Update cuda_tree_learner.h

* Update cuda.yml

* [ci] upgrade GitHub Actions third-party actions to newest versions

* add git to sanitizers container

* install git before checkout

* Update .github/workflows/r_package.yml
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* setup CUDA CI job

* minor updates