Please provide sig files for builds

#### Which feature is your request related to?
Security of builds.
#### Is your request related to a problem? Please describe.
No.
#### Describe the solution you'd like:
I'd like signature (ie public keys/private keys signatures) to be provided to verify that the builds are safe.
#### Describe alternatives you've considered:
None
#### Additional context:
I maintain the AUR package for this and would like add more security to it.
Thanks!

@thedoublejay