Missing SHA256SUM for recent releases

[davidbartos]

The previosuly included (i.e. v1.0.21) sha256sum files are missing from the most recent releases. Can you please add those besides the source code.

[chrisohaver]

The checksums are for the command line tool assets, which were not released in those releases.
The source code is for the entire package, but there is no checksum associated with that asset.