update rust versions

bump version

Unique sender (#51)

* make sender unique pointer

* bump version to v0.5.0

* just use latest nightly

* remove PR build MACOS

fix log typo

bump version to v0.3.4

separate file and line in log

amend previous fix

remove send_block handle clone

fix memory leak in Waker move assignment (#42)

* fix memory leak in Waker move assignment

* add a debug codesign for MacOS Instruments

remove concurrentqueue as subdirectory