Use fast-async for async/await support #366
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fast-async is based on nodent, a generator-optional implementation of async/await support.
By default, it does not use generators, which saves the usage of regenerator if generator functions are not otherwise used. It is also significantly faster, with order-of-magnitude perf gains on mobile browsers in particular.
It also smaller, reducing gzipped file size by 1.44KB in a simple test case:
Test case code:
I'm not an expert on this library, so there may be further gains to be had from better tuning. But on the surface, we're already getting a good bump on both speed and size.