build(deps): bump config from 5.1.0 to 5.4.0 (#7054)

Bumps [config](https://github.com/rubyconfig/config) from 5.1.0 to 5.4.0.
- [Release notes](https://github.com/rubyconfig/config/releases)
- [Changelog](https://github.com/rubyconfig/config/blob/master/CHANGELOG.md)
- [Commits](rubyconfig/config@5.1.0...5.4.0)

Also adds dry-validation gem as a dependency, which was removed from
config in 5.3.0

---
updated-dependencies:
- dependency-name: config
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -62,6 +62,7 @@ gem 'activemodel-serializers-xml'
 gem 'activerecord-session_store'
 gem 'config'
 gem 'cookies_eu'
+gem 'dry-validation'  # For settings schema validation
 gem 'exception_notification'
 gem 'rails-html-sanitizer'
 gem 'rails_performance'

Gemfile.lock

@@ -136,9 +136,8 @@ GEM
       matrix
       ruby-rc4 (>= 0.1.5)
     concurrent-ruby (1.2.3)
-    config (5.1.0)
+    config (5.4.0)
       deep_merge (~> 1.2, >= 1.2.1)
-      dry-validation (~> 1.0, >= 1.0.0)
     connection_pool (2.4.1)
     cookies_eu (1.7.8)
       js_cookie_rails (~> 2.2.0)
@@ -516,6 +515,7 @@ DEPENDENCIES
   cookies_eu
   debug (>= 1.0.0)
   descriptive_statistics
+  dry-validation
   exception_notification
   factory_bot_rails
   faker