feat: add delete_reactions support for ban user (#206)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: totalimmersion

spec/client_spec.rb

@@ -265,6 +265,10 @@ def loop_times(times)
     @client.ban_user(@random_user[:id], user_id: @random_users[0][:id])
   end
 
+  it 'bans a user with delete_reactions' do
+    @client.ban_user(@random_user[:id], user_id: @random_users[0][:id], delete_reactions: true)
+  end
+
   it 'unbans a user' do
     @client.ban_user(@random_user[:id], user_id: @random_users[0][:id])
     @client.unban_user(@random_user[:id], user_id: @random_users[0][:id])