Uploading too many assets

[alexellis]

We appear to be uploading too many assets

Expected Behaviour

Just the tgz and SHA files should be added to the releases page

Current Behaviour

Everything is being added including the uncompressed versions.

Possible Solution

Filter the files in the staging directory (bin) or update the publish job to filter the uploads

Steps to Reproduce (for bugs)

1. Fork the repo
2. Do a release build

[alexellis]

@utsavanand2 PTAL?