Multipass!

There is no need to upgrade to this version. It was created only so that you can continue to compile Krill locally using the latest Rust compiler.

As it turns out the use of many asynchronous calls, the cool stuff which make Krill thread safe, cause the compiler to do quite a bit of work in a process called 'Monomorphization'. The latest compiler version will go on strike as a result, unless we instruct it beforehand that more work is coming its way.