Bump govuk_app_config from 2.1.2 to 2.2.0

Bumps [govuk_app_config](https://github.com/alphagov/govuk_app_config) from 2.1.2 to 2.2.0.
- [Release notes](https://github.com/alphagov/govuk_app_config/releases)
- [Changelog](https://github.com/alphagov/govuk_app_config/blob/master/CHANGELOG.md)
- [Commits](alphagov/govuk_app_config@v2.1.2...v2.2.0)

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

Author: dependabot-preview[bot]

Gemfile

@@ -6,7 +6,7 @@ gem "asset_bom_removal-rails", "~> 1.0"
 gem "dalli"
 gem "gds-api-adapters", "~> 63.5"
 gem "govuk_ab_testing", "~> 2.4"
-gem "govuk_app_config", "~> 2.1"
+gem "govuk_app_config", "~> 2.2"
 gem "govuk_publishing_components", "~> 21.46.0"
 gem "htmlentities", "~> 4.3"
 gem "plek", "~> 3.0"

Gemfile.lock

@@ -101,7 +101,7 @@ GEM
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     govuk_ab_testing (2.4.1)
-    govuk_app_config (2.1.2)
+    govuk_app_config (2.2.0)
       logstasher (>= 1.2.2, < 1.4.0)
       sentry-raven (>= 2.7.1, < 3.1.0)
       statsd-ruby (~> 1.4.0)
@@ -166,7 +166,7 @@ GEM
     mini_magick (4.9.5)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.14.0)
+    minitest (5.14.1)
     minitest-reporters (1.4.2)
       ansi
       builder
@@ -357,7 +357,7 @@ DEPENDENCIES
   faker
   gds-api-adapters (~> 63.5)
   govuk_ab_testing (~> 2.4)
-  govuk_app_config (~> 2.1)
+  govuk_app_config (~> 2.2)
   govuk_publishing_components (~> 21.46.0)
   govuk_schemas (~> 4.0)
   govuk_test