Bump webpacker from 5.3.0 to 5.4.0 (#16297)

Bumps [webpacker](https://github.com/rails/webpacker) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v5.3.0...v5.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

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

Gemfile

@@ -91,7 +91,7 @@ gem 'strong_migrations', '~> 0.7'
 gem 'tty-prompt', '~> 0.23', require: false
 gem 'twitter-text', '~> 3.1.0'
 gem 'tzinfo-data', '~> 1.2021'
-gem 'webpacker', '~> 5.3'
+gem 'webpacker', '~> 5.4'
 gem 'webpush', '~> 0.3'
 gem 'webauthn', '~> 3.0.0.alpha1'
 

Gemfile.lock

@@ -650,7 +650,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    webpacker (5.3.0)
+    webpacker (5.4.0)
       activesupport (>= 5.2)
       rack-proxy (>= 0.6.1)
       railties (>= 5.2)
@@ -792,6 +792,6 @@ DEPENDENCIES
   tzinfo-data (~> 1.2021)
   webauthn (~> 3.0.0.alpha1)
   webmock (~> 3.13)
-  webpacker (~> 5.3)
+  webpacker (~> 5.4)
   webpush (~> 0.3)
   xorcist (~> 1.1)