Add CHANGELOG.md

Fix rubocop

Author: ericproulx

CHANGELOG.md

@@ -18,6 +18,7 @@
 * [#2546](https://github.com/ruby-grape/grape/pull/2546): Fix middleware with keywords - [@ericproulx](https://github.com/ericproulx).
 * [#2547](https://github.com/ruby-grape/grape/pull/2547): Remove jsonapi related code - [@ericproulx](https://github.com/ericproulx).
 * [#2548](https://github.com/ruby-grape/grape/pull/2548): Formatting from header acts like versioning from header - [@ericproulx](https://github.com/ericproulx).
+* [#2552](https://github.com/ruby-grape/grape/pull/2552): Fix declared params optional array - [@ericproulx](https://github.com/ericproulx).
 * Your contribution here.
 
 ### 2.3.0 (2025-02-08)

spec/grape/endpoint/declared_spec.rb

@@ -874,8 +874,7 @@
       end
     end
 
-    before {  post '/', { "z": [] } }
-
+    before { post '/', { z: [] } }
 
     it { is_expected.to be_successful }
   end