Merge pull request #2144 from anakinj/activesupport61-fix

Explicitly require active_support/core_ext/array/conversions

Author: dblock

CHANGELOG.md

@@ -7,6 +7,7 @@
 #### Fixes
 
 * Your contribution here.
+* [#2144](https://github.com/ruby-grape/grape/pull/2144): Fix compatibility issue with activesupport 6.1 and XML serialization of arrays - [@anakinj](https://github.com/anakinj).
 * [#2137](https://github.com/ruby-grape/grape/pull/2137): Fix typos - [@johnny-miyake](https://github.com/johnny-miyake).
 * [#2131](https://github.com/ruby-grape/grape/pull/2131): Fix Ruby 2.7 keyword deprecation warning in validators/coerce - [@K0H205](https://github.com/K0H205).
 * [#2132](https://github.com/ruby-grape/grape/pull/2132): Use #ruby2_keywords for correct delegation on Ruby <= 2.6, 2.7 and 3 - [@eregon](https://github.com/eregon).

lib/grape.rb

@@ -12,6 +12,7 @@
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/array/extract_options'
 require 'active_support/core_ext/array/wrap'
+require 'active_support/core_ext/array/conversions'
 require 'active_support/core_ext/hash/deep_merge'
 require 'active_support/core_ext/hash/reverse_merge'
 require 'active_support/core_ext/hash/except'