This MR makes the following changes to the CI pipeline:
-
uses the needskeyword for concurrent processing of jobs (see https://docs.gitlab.com/ee/ci/pipelines/pipeline_architectures.html#directed-acyclic-graph-pipelines). -
provide a unit test report to GitLab, this makes identifying failed tests easier. ( 🤣 needs ctest 3.21, https://cmake.org/cmake/help/v3.21/release/3.21.html#ctest) -
remove ubuntu16 (EOL), add ubuntu20