Update Bluebird typings to 2.x and fix some issues:

- 'Old' typings moved to "-1x" version
- Not all v2 methods are added yet
- Promise also implements Inspection
- .finally() doesn't get the value in its callback
- .done() returns void, not a Promise
- Add .tap() and .setScheduler()
- Add error types for use in e.g. catch()'ing specific errors
- Inspection.error() renamed to .reason()