Merge branch 'ruby-2.7' into 'master'

Update Ruby from 2.3 to 2.7

See merge request gitlab-org/gitlab-exporter!128
6 jobs for master in 2 minutes and 28 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #9302044
gitlab-org
gemnasium-dependency_scanning

00:00:21

passed #9302045
gitlab-org
license_scanning

00:02:28

passed #9302048
gitlab-org
rspec

00:00:42

passed #9302049
gitlab-org
rubocop

00:00:31

passed #9302047
gitlab-org
secret_detection

00:00:14

passed #9302046
gitlab-org
secret_detection_default_branch

00:00:26