Version of Terminus used in Gitlab integration is very old

[ABAJosh]

Drainpipe currently uses Terminus 3.0.7, while the current version is 3.2.1. We should upgrade to the current version. This is a simple change in the following file: scaffold/gitlab/Pantheon.gitlab-ci.yml

The line:
curl -L https://github.com/pantheon-systems/terminus/releases/download/3.0.7/terminus.phar --output ~/terminus/terminus

should be changed to:
curl -L https://github.com/pantheon-systems/terminus/releases/download/3.2.1/terminus.phar --output ~/terminus/terminus

[justafish]

@ABAJosh 👋 Could you test this branch on your site and check that it doesn't break anything please? I don't have anything with GitLab setup to hand at the moment 259

[ABAJosh]

Tested and verified that Terminus is working as expected.