Ruby 2.5 and appsignal update

.gitlab-ci.yml

CHANGELOG.md

Gemfile

Gemfile.lock

lib/roqua-support/version.rb

lib/roqua/core_ext/fixnum/clamp.rb

lib/roqua/logging/roqua_logging_railtie.rb

lib/roqua/probes/base_probe.rb

lib/roqua/support.rb

lib/roqua/support/errors.rb

roqua-support.gemspec

spec/roqua/core_ext/enumerable/sort_by_alphanum_spec.rb

spec/roqua/core_ext/fabrication/singleton_spec.rb

spec/roqua/core_ext/fixnum/clamp_spec.rb

spec/roqua/probes/delayed_job_probe_spec.rb

spec/roqua/support/helpers_spec.rb

spec/roqua/support/logwrapper_spec.rb

spec/roqua/support/request_logger_spec.rb

spec/roqua/support_spec.rb