Bump webpacker from 5.1.1 to 5.2.0 (#14586)

Bumps [webpacker](https://github.com/rails/webpacker) from 5.1.1 to 5.2.0.
- [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/v5.1.1...v5.2.0)

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

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

Gemfile

@@ -97,7 +97,7 @@ gem 'strong_migrations', '~> 0.7'
 gem 'tty-prompt', '~> 0.22', require: false
 gem 'twitter-text', '~> 1.14'
 gem 'tzinfo-data', '~> 1.2020'
-gem 'webpacker', '~> 5.1'
+gem 'webpacker', '~> 5.2'
 gem 'webpush'
 
 gem 'json-ld'

Gemfile.lock

@@ -632,7 +632,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    webpacker (5.1.1)
+    webpacker (5.2.0)
       activesupport (>= 5.2)
       rack-proxy (>= 0.6.1)
       railties (>= 5.2)
@@ -776,5 +776,5 @@ DEPENDENCIES
   twitter-text (~> 1.14)
   tzinfo-data (~> 1.2020)
   webmock (~> 3.8)
-  webpacker (~> 5.1)
+  webpacker (~> 5.2)
   webpush