Remove builder as a dependency (#2445)

CHANGELOG.md

@@ -30,6 +30,7 @@
 * [#2434](https://github.com/ruby-grape/grape/pull/2434): Implement nested `with` support in parameter dsl - [@numbata](https://github.com/numbata).
 * [#2438](https://github.com/ruby-grape/grape/pull/2438): Fix some Rack::Lint - [@ericproulx](https://github.com/ericproulx).
 * [#2437](https://github.com/ruby-grape/grape/pull/2437): Add length validator - [@dhruvCW](https://github.com/dhruvCW).
+* [#2445](https://github.com/ruby-grape/grape/pull/2445): Remove builder as a dependency - [@ericproulx](https://github.com/ericproulx).
 * Your contribution here.
 
 #### Fixes

Gemfile

@@ -7,6 +7,7 @@ source('https://rubygems.org')
 gemspec
 
 group :development, :test do
+  gem 'builder', require: false
   gem 'bundler'
   gem 'rake'
   gem 'rubocop', '1.63.2', require: false

UPGRADING.md

@@ -3,6 +3,12 @@ Upgrading Grape
 
 ### Upgrading to >= 2.1.0
 
+#### Optional Builder
+
+The `builder` gem dependency has been made optional as it's only used when generating XML. If your code does, add `builder` to your `Gemfile`.
+
+See [#2445](https://github.com/ruby-grape/grape/pull/2445) for more information.
+
 #### Deep Merging of Parameter Attributes
 
 Grape now uses `deep_merge` to combine parameter attributes within the `with` method. Previously, attributes defined at the parameter level would override those defined at the group level.

grape.gemspec

@@ -21,7 +21,6 @@ Gem::Specification.new do |s|
   }
 
   s.add_runtime_dependency 'activesupport', '>= 6'
-  s.add_runtime_dependency 'builder'
   s.add_runtime_dependency 'dry-types', '>= 1.1'
   s.add_runtime_dependency 'mustermann-grape', '~> 1.1.0'
   s.add_runtime_dependency 'rack', '>= 2'