v0.9.4 rate limiter may be broken #62

After integrating this, #59, I did quick testing but didn't re-run all my examples to verify that the library still works properly. The hanging was solved, but batch promises don't seem to resolve via Promise.all.

For now stay on v0.9.3 or upgrade to v0.9.5 (they are the same things). v0.9.4 only introduces this hanging change.

What basically happens is the first promise of Promise.all will resolve, but the rest will not be resolved (in debug, the first request will be a success, while the rest are ignored, and then the process resolves).

For now I'll revert the change for v0.9.5 to prevent new install issues.