Async Interop Event Loop Versions Save

• Changed namespace to AsyncInterop instead of Interop\Async.

• Changed exception base classes for thrown exceptions to Exception.
• Added InvalidWatcherException::getWatcherId().
• Loop::setErrorHandler should now return the old handler.
• Renamed Loop::info to Loop::getInfo.
• Require weak types for all callbacks.

• InvalidWatcherException should no longer be thrown if an invalid watcher identifier is provided to Driver::disable(). The function call should now be a no-op with invalid watcher identifiers (similar to Driver::cancel()).

• Rename Driver::storeState to Driver::setState
• Rename Driver::fetchState to Driver::getState
• Convert Driver from an interface to an abstract class
• Merge Registry into Driver as it's now an abstract class
• Add warning about different scopes for onSignal

First tagged version of the standard's draft. Implementations can now depend on it using async-interop/event-loop:^0.1 in their composer.json file.