Update to Elixir 1.13
What does this MR do?
Update the base image to Elixir 1.13 as requested in gitlab-org/gitlab#410169 (comment 1397872731). This issue also includes a customer reporting that an equivalent local modification to the Dockerfile is working well for their old (pre-1.13) and new (1.13 or higher) projects.
Elixir states that minor versions are backwards-compatible. They are also up to 1.15 now, but I would think it is safer to bump to 1.13 now, then test 1.15 as a separate upgrade in case there is anything funky in the intervening two releases.
What are the relevant issue numbers?
gitlab-org/gitlab#410169 (comment 1397872731)
Does this MR meet the acceptance criteria?
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Changelog entry added -
Documentation created/updated for GitLab EE, if necessary -
Documentation created/updated for this project, if necessary -
Documentation reviewed by technical writer or follow-up review issue created -
Tests updated/added for this feature/bug -
Job definition updated, if necessary -
Conforms to the code review guidelines -
Conforms to the Go guidelines -
Security reports checked/validated by reviewer
Edited by Connor Gilbert