Bump gitlab from 4.17.0 to 4.18.0

Created by: dependabot[bot]

Bumps gitlab from 4.17.0 to 4.18.0.

Release notes

Sourced from gitlab's releases.

v4.18.0

General improvements

• Support Ruby 3.0 #598 #615
• Respect HTTP 429 and Retry-After header #628
• Maintain methods across redirects #629
• Allow newer versions of terminal-table #613

Bugfixes

• Fixed remove_variable to allow filtering by environment_scope #608
• Fixed 404 error when retrieving the issues via merge_request_closes_issues #630

New features

• Added support for finding a user/key by fingerprint #596
• Added support for custom attributes for users, projects and groups #595
• Added support for options in projects query #609
• Added support for changelog API #607
• Added support for rebase merge request #614
• Added support for user impersonation tokens #604
• Added support for remote mirrors API #618
• Added support for merge request level rule API #617
• Added support for get deploy tokens of project #620
• Added support for for running pipeline schedule #625
• Added support for create merge request pipeline API #624

Commits

• 270c636 Release v4.18.0
• 270c714 Add FUNDING.yml
• 6f4e4df Fix rubocop offenses
• 25f6f76 Merge pull request #629 from ikravets/fix-redirects
• 6c7f1ef Merge pull request #630 from revolter/patch-1
• 35a4e6a Fix 404 error when retrieving the issues a merge_request will close
• d83f809 Maintain methods across redirects
• 1e8c635 Merge pull request #628 from craigmiskell-gitlab/handle-rate-limiting-responses
• 8256d97 Respect HTTP 429 and Retry-After header
• 06946d8 Merge pull request #626 from sliaquat/run-pipeline-schedule
• Additional commits viewable in compare view

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