Sync with wasm-tools a bit more, clarify task.return & borrows - #737

Sync with wasm-tools a bit more, clarify task.return & borrows#737

lukewagner merged 2 commits into

WebAssembly:mainWebAssembly/component-model:mainfrom

alexcrichton:minor-updatesalexcrichton/component-model:minor-updatesCopy head branch name to clipboard