fix(request.signer.js): Client-side signing errors don't reject promise (#1666)
fix(request.signer.js): Client-side signing errors don't reject promise (#1666)

This is yet another instance that details why I would like to rip out `qq.Promise` and instead depend on native `Promise` (or require a polyfill).
FineUploader/fine-uploader,FineUploader/fine-uploader,FineUploader/fine-uploader