[3.2.4] - 2023-04-14 changed: * clarified documentation about overflow for `StopwatchImpl::checked_sub` and `StopwatchImpl::saturating_sub` fixed: * fixed `Eq` implementation for `StopwatchImpl<I>` (derived) restricting `I` to implement `Eq` * fixed `Eq` and `PartialEq` implementation for `Guard<'_, I>` (derived) restricting `I` to implement `Eq` and `PartialEq`, respectively