Bump govuk_publishing_components from 20.3.0 to 20.4.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 20.3.0 to 20.4.0.
- [Release notes](https://github.com/alphagov/govuk_publishing_components/releases)
- [Changelog](https://github.com/alphagov/govuk_publishing_components/blob/master/CHANGELOG.md)
- [Commits](alphagov/govuk_publishing_components@v20.3.0...v20.4.0)

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

Author: dependabot-preview[bot]

Gemfile

@@ -16,7 +16,7 @@ gem 'gds-api-adapters', '~> 60.0'
 gem 'govuk_ab_testing', '~> 2.4'
 gem 'govuk_app_config', '~> 2.0'
 gem 'govuk_frontend_toolkit', '~> 8.2.0'
-gem 'govuk_publishing_components', '~> 20.3.0'
+gem 'govuk_publishing_components', '~> 20.4.0'
 gem 'plek', '~> 3.0'
 gem 'slimmer', '~> 13.1'
 

Gemfile.lock

@@ -114,7 +114,7 @@ GEM
     govuk_frontend_toolkit (8.2.0)
       railties (>= 3.1.0)
       sass (>= 3.2.0)
-    govuk_publishing_components (20.3.0)
+    govuk_publishing_components (20.4.0)
       gds-api-adapters
       govuk_app_config
       govuk_frontend_toolkit
@@ -296,7 +296,7 @@ GEM
     selenium-webdriver (3.142.4)
       childprocess (>= 0.5, < 3.0)
       rubyzip (~> 1.2, >= 1.2.2)
-    sentry-raven (2.11.0)
+    sentry-raven (2.11.1)
       faraday (>= 0.7.6, < 1.0)
     slimmer (13.1.0)
       activesupport
@@ -368,7 +368,7 @@ DEPENDENCIES
   govuk_ab_testing (~> 2.4)
   govuk_app_config (~> 2.0)
   govuk_frontend_toolkit (~> 8.2.0)
-  govuk_publishing_components (~> 20.3.0)
+  govuk_publishing_components (~> 20.4.0)
   govuk_schemas (~> 4.0)
   govuk_test
   htmlentities (~> 4.3)