This is probably the least important issue but figured we can discuss it anyway.

All the current stable versions of node and browsers support promises and bluebird is not a dependency that libraries should ship with if it can be avoided.

the codebase itself could really benefit from cleanup and a switch to native promises and async/await.

I don't see this adding much value other than decreasing the likelihood of silly errors like #62 and general code legibility (promises with callbacks tend to be less legible in most circumstances than the equivalent async/await).

P.S. I am aware that not ALL promise usages should be transferred to async/await, especially for concurrency but most of the functions tend to be step by step inside anyway.