Merge branch 'update/packages' into 'develop'

.gitlab-ci.yml

.gitlab-ci/clang10-mpi-coverage.yml

.gitlab-ci/clang10-mpi-release.yml

.gitlab-ci/clang10-seq-coverage.yml

.gitlab-ci/clang10-seq-release.yml

.gitlab-ci/clang8-mpi-coverage.yml

.gitlab-ci/clang8-mpi-release.yml

.gitlab-ci/clang8-seq-coverage.yml

.gitlab-ci/clang8-seq-release.yml

CMakeLists.txt

packages/CLI11/.all-contributorsrc

packages/CLI11/.clang-tidy

packages/CLI11/.github/actions/cmake_config/Dockerfile

packages/CLI11/.github/workflows/tests.yml

packages/CLI11/.gitrepo

packages/CLI11/CHANGELOG.md

packages/CLI11/CMakeLists.txt

packages/CLI11/README.md

packages/CLI11/azure-pipelines.yml

packages/CLI11/book/chapters/config.md