This will make it possible for Oracle Cloud to work with S3 by disabling
Signature V4 streaming (https://github.com/fog/fog-aws/issues/523).

Full CHANGELOG:
https://github.com/fog/fog-aws/blob/master/CHANGELOG.md

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/63041

This was done to perform some local testing, but while the change was
already made it made sense to commit the change.

Updates changed method names and fixes spec failures

Adds more friendly docs for GraphQl implementation

This brings the rspec-core version in line with the Gitaly changes
and introduces Rails 5.1/5.2 improvements.

Full CHANGELOG:
https://github.com/rspec/rspec-rails/blob/master/Changelog.md

Update net-ssh gem to ~> 5.2

See merge request gitlab-org/gitlab-ce!30341

The configuration is currently only specified in CI, by moving it into
`.mdlrc` we get immediate feedback locally in supported editors.

To ensure `mdl` is available it's also added to the `Gemfile`, though
CI will still use the version installed in the `gitlab-docs-lint` image.

This fixes a critical error where a nil exception would be hit
if an error occurred while logging a Prometheus metric:

https://gitlab.com/gitlab-org/prometheus-client-mmap/merge_requests/36

Upgrade prometheus-client-mmap to 0.9.7

See merge request gitlab-org/gitlab-ce!30430

This release includes continued improvements to the library, fixes for a
number of lexers and support for three new languages:
https://github.com/rouge-ruby/rouge/releases