Fixed error when generating hashes

This release is identical to v3, but fixes a crash when generating hashes.

Updated to Node 16, added `get-assets` option

New in this release:

• Added get-assets option to re-download asset list before running
• Updated to Node 16
• Updated dependencies to fix security vulnerabilities
• Switched to ES modules for node-fetch v3.x

Reversed hash and file name

File is now output in the format hash file.ext. Also upgraded some dependencies to fix security vulnerabilities.

First release

This is the first release of Generate Release Hashes. See the readme for more info.