Merge branch '70-version-bump' into 'master'

Bump version to 7.0.3

See merge request gitlab-org/gitlab-exporter!115
2 jobs for v7.0.3 in 2 minutes and 6 seconds
latest
Status Job ID Name Coverage
  Test
passed #7832497
gitlab-org
rspec

00:01:58

passed #7832498
gitlab-org
rubocop

00:02:06