Update Lolex (and Nise) for new async timer methods

[fatso83]

Purpose (TL;DR) - mandatory

Updates Lolex for new async methods made by @kylefleming
(async versions of all timer-executing calls).

Background (Problem in detail) - optional

See sinonjs/fake-timers#105 (repackaged as sinonjs/fake-timers#237)

The goal of these functions is to provide those
writing tests with tools to test code that uses
promises without having to work around the fact
that lolex executes all timers synchronously in a row.

How to verify - mandatory

1. npm install && npm test
2. Try to use some of the new methods from Lolex

[mroderick]

I guess this will go into the next semver:major, which will be a very nice upgrade 👍

[fatso83]

It's not breaking, though. Just wanted to signal that :)