Feasibility of spawn_sync #7
Description
Since this is a 'futures-executor' it is understandable that Threadpool::spawn and Threadpool::spawn_ok execute futures.
However when spawning multiple threads from an async function, the lifetime of everything that is moved inside the async scopes have to be 'static, even if you join all the spawned threads.
Would it be possible to add a Threadpool::spawn_sync to execute non-async scopes in order to move in references to the scopes (without the need of Arc) that are executed on the threads?