Bump govuk_app_config from 1.20.2 to 2.0.0

Bumps [govuk_app_config](https://github.com/alphagov/govuk_app_config) from 1.20.2 to 2.0.0.
- [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@v1.20.2...v2.0.0)

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

Gemfile

@@ -15,7 +15,7 @@ gem 'uglifier', '>= 1.3.0'
 
 gem 'gds-api-adapters', '~> 60.0'
 gem 'govuk_ab_testing', '~> 2.4'
-gem 'govuk_app_config', '~> 1.20'
+gem 'govuk_app_config', '~> 2.0'
 gem 'govuk_frontend_toolkit', '~> 8.2.0'
 gem 'govuk_publishing_components', '~> 17.21.0'
 gem 'plek', '~> 3.0'

Gemfile.lock

@@ -55,8 +55,6 @@ GEM
       rails (>= 4.2)
       sass (> 3.4)
     ast (2.4.0)
-    aws-xray-sdk (0.10.2)
-      oj (~> 3.0)
     better_errors (2.5.1)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
@@ -108,8 +106,7 @@ GEM
       rubocop-rspec (~> 1.28)
       scss_lint
     govuk_ab_testing (2.4.1)
-    govuk_app_config (1.20.2)
-      aws-xray-sdk (~> 0.10.0)
+    govuk_app_config (2.0.0)
       logstasher (>= 1.2.2, < 1.4.0)
       sentry-raven (>= 2.7.1, < 2.12.0)
       statsd-ruby (~> 1.4.0)
@@ -192,7 +189,6 @@ GEM
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     null_logger (0.0.1)
-    oj (3.8.1)
     parallel (1.17.0)
     parser (2.6.3.0)
       ast (~> 2.4.0)
@@ -368,7 +364,7 @@ DEPENDENCIES
   gds-api-adapters (~> 60.0)
   govuk-lint
   govuk_ab_testing (~> 2.4)
-  govuk_app_config (~> 1.20)
+  govuk_app_config (~> 2.0)
   govuk_frontend_toolkit (~> 8.2.0)
   govuk_publishing_components (~> 17.21.0)
   govuk_schemas (~> 4.0)