🐛 Fix `config.responses_without_block = :frozen_dup` (backport to 0.4)#589

nevans merged 1 commit intov0.4-stableruby/net-imap:v0.4-stablefrom

backport-0.4/fix-responses-frozen_dupruby/net-imap:backport-0.4/fix-responses-frozen_dupCopy head branch name to clipboard