* Bump default Ruby version to 2.7.7: https://gitlab.com/gitlab-org/ruby/gems/labkit-ruby/-/merge_requests/102 * Add asdf support via `.tool-versions`: https://gitlab.com/gitlab-org/ruby/gems/labkit-ruby/-/merge_requests/103 * Reject reserved log keys in dev & test: https://gitlab.com/gitlab-org/ruby/gems/labkit-ruby/-/merge_requests/105