Wrapping a RateLimiterRedis with many RateLimiterQueues
We have a situation where we want to rate limit actions on individual record IDs. Rate limiter queue on top of a Redis limiter handles this job for us, but we need it to consume per record ID however current RateLimiterQueue [calls consume with a hardcoded limiter name](https://github.com/animir/node-rate-limiter-flexible/blob/ccb5f5c10455e6af5d0a84d9db5615523251db9d/lib/RateLimiterQueue.js#L36)

Any chance to make `_key` parametric in queue constructor or a `removeTokens` overload with `_key` parameter so that we can dynamically use many granular queues over a single limiter instance?