Allow setting a custom HTTP method in CacheBuster (#26528)

Co-authored-by: Jorijn Schrijvershof <jorijn@jorijn.com>

config/application.rb

@@ -51,6 +51,7 @@ require_relative '../lib/rails/engine_extensions'
 require_relative '../lib/active_record/database_tasks_extensions'
 require_relative '../lib/active_record/batches'
 require_relative '../lib/simple_navigation/item_extensions'
+require_relative '../lib/http_extensions'
 
 Dotenv::Railtie.load
 

config/initializers/cache_buster.rb

@@ -6,5 +6,6 @@ Rails.application.configure do
   config.x.cache_buster = {
     secret_header: ENV['CACHE_BUSTER_SECRET_HEADER'],
     secret: ENV['CACHE_BUSTER_SECRET'],
+    http_method: ENV['CACHE_BUSTER_HTTP_METHOD'] || 'GET',
   }
 end