Laytan

Currently, `@(enable_target_feature)` enables the features globally in the project, and `@(require_target_feature)` seems unimplemented. This PR aims to at a high level make `@(enable_target_feature)` procedure scoped, and `@(require_target_feature)` actually useful and...

- The futex wait was called with the wrong `expected` parameter, this is supposed to be what you expect there to currently be, not what you want it to be....

I can't figure out why, but some tests are failing, when individually trying them works, so this must be something with the test setup.

Something like 'skip_at_cursor' which leaves the string/class declaration that the cursor is in untouched.

Supersedes #33 because that was going into the wrong direction. Fixes #14 Fixes #15 Fixes #16

Adapt middleware API's for non-blocking

1

The non-blocking IO in #1 added callbacks for operations like retrieving the body. But more importantly this removes the guarantee that a response is made synchronously. Middlewares can no longer...