Bump config from 5.0.0 to 5.1.0

Bumps [config](https://github.com/rubyconfig/config) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/rubyconfig/config/releases)
- [Changelog](https://github.com/rubyconfig/config/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubyconfig/config/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -33,7 +33,7 @@ gem "phonelib"
 gem "audited", "~> 5.4"
 gem "concurrent-ruby", require: "concurrent"
 gem "concurrent-ruby-ext"
-gem "config", "~> 5.0"
+gem "config", "~> 5.1"
 gem "devise", "~> 4.9"
 gem "flipper"
 gem "flipper-active_record"

Gemfile.lock

@@ -112,7 +112,7 @@ GEM
     concurrent-ruby (1.2.2)
     concurrent-ruby-ext (1.2.2)
       concurrent-ruby (= 1.2.2)
-    config (5.0.0)
+    config (5.1.0)
       deep_merge (~> 1.2, >= 1.2.1)
       dry-validation (~> 1.0, >= 1.0.0)
     connection_pool (2.4.1)
@@ -509,7 +509,7 @@ DEPENDENCIES
   capybara
   concurrent-ruby
   concurrent-ruby-ext
-  config (~> 5.0)
+  config (~> 5.1)
   dartsass-rails (~> 0.5.0)
   debug
   devise (~> 4.9)