* feature: pending_escalator
* feature: send_escalating in Middleware
* bug: don't drop unready futures in escalator.poll
* chore: docs and must_use
* chores: lints, clippies, wasm fixes, dedup pinboxfut
* chore: more lints
* refactor: use Delay in polling interval to ensure re-waking
* refactor: simplify Sleeping state transition as last will never be None again
* bug: properly set last when broadcasts resolve
* feature: debug implementation for EscalatingPending
* refactor: with_ setters and escalations argument
* refactor: use FuturesUnOrdered instead of a vec of futures
* chore: update CHANGELOG with recent PR info
* chore: update all comments on pending escalator
* chore: run rustfmt