One of the emerging best practices around Bluebird Promises is to use promise.try() per the blog post here: http://cryto.net/~joepie91/blog/2016/05/11/what-is-promise-try-and-why-does-it-matter/

Instead of instructing people (somewhat briefly and confusingly) to use .catch() in the "Error Handling" section of README.md, it would be better to include an example along the lines of those in the above blog post which uses Promise.try()