Fix build_query losing array param values on sort/paginate

Array#to_s returns inspect output (e.g. '["uuid"]'), which Rails
re-parses as a literal string inside the array. Use Array(v) to
handle both scalar and array values correctly.

Author: djalmaaraujo

lib/ruby_ui/data_table/data_table_pagination.rb

@@ -48,7 +48,9 @@ def page_href(p)
     end
 
     def build_query(hash)
-      hash.map { |k, v| "#{CGI.escape(k.to_s)}=#{CGI.escape(v.to_s)}" }.join("&")
+      hash.flat_map { |k, v|
+        Array(v).map { |val| "#{CGI.escape(k.to_s)}=#{CGI.escape(val.to_s)}" }
+      }.join("&")
     end
 
     def prev_item

lib/ruby_ui/data_table/data_table_sort_head.rb

@@ -44,7 +44,9 @@ def sort_href
     end
 
     def build_query(hash)
-      hash.map { |k, v| "#{CGI.escape(k.to_s)}=#{CGI.escape(v.to_s)}" }.join("&")
+      hash.flat_map { |k, v|
+        Array(v).map { |val| "#{CGI.escape(k.to_s)}=#{CGI.escape(val.to_s)}" }
+      }.join("&")
     end
 
     def sort_icon